1 India-CMS Newsletter Vol 1. No. 1, July 2015 First volume produced at: Department of Physics Panjab University Sector 14 Chandigarh - 160014 Edited and Compiled by: Manjit Kaur Department of Physics Panjab University Chandigarh [email protected]Ajit Mohanty Director Saha Institute of Nuclear Physics (SINP) Kolkatta [email protected]Abhimanyu Chawla Department of Physics Panjab University Chandigarh [email protected]Member Institutes/ Universities of India-CMS 1. Nuclear Physics Division (NPD) Bhabha Atomic Research Center (BARC) Mumbai http://www.barc.gov.in/ 2. Indian Institute of Science Education and Research (IISER) Pune http://www.iiserpune.ac.in 3. Indian Institute of Technology (IIT), Bhubaneswar Bhubaneswar http:// www.iitbbs.ac.in 4. Department of Physics Indian Institute of Technology (IIT), Bombay Mumbai http://www.iitb.ac.in/en/education/academic-divisions 5. Indian Institute of Technology (IIT), Madras Chennai https://www.iitm.ac.in 6. School of Physical Sciences National Institute of Science Education and Research (NISER), Bhubaneswar http://physics.niser.ac.in/ 7. Department of Physics Panjab University Chandigarh http://physics.puchd.ac.in/ 8. Division of High Energy Nuclear and Particle Physics Saha Institute of Nuclear Physics (SINP) Kolkata http://www.saha.ac.in/web/henppd-home 9. Department of High Energy Physics Tata Institute of Fundamental Research (TIFR), Mumbai http://www.tifr.res.in/ ~dhep/ 10. Department of Physics & Astrophysics University of Delhi Delhi http://www.du.ac.in/du/index.php?page=physics-astrophysics 11. Visva Bharti Santiniketan, West Bengal 731204 http://www.visvabharati.ac.in/Address.html
Transcript
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India-CMS Newsletter Vol 1. No. 1, July 2015 First volume produced at: Department of Physics Panjab University Sector 14 Chandigarh - 160014 Edited and Compiled by: Manjit Kaur Department of Physics Panjab University Chandigarh [email protected] Ajit Mohanty Director Saha Institute of Nuclear Physics (SINP) Kolkatta [email protected] Abhimanyu Chawla Department of Physics Panjab University Chandigarh [email protected]
Member Institutes/ Universities of India-CMS
1. Nuclear Physics Division (NPD)
Bhabha Atomic Research Center (BARC) Mumbai http://www.barc.gov.in/
2. Indian Institute of Science Education and Research (IISER) Pune http://www.iiserpune.ac.in
3. Indian Institute of Technology (IIT), Bhubaneswar Bhubaneswar http:// www.iitbbs.ac.in
4. Department of Physics Indian Institute of Technology (IIT), Bombay Mumbai http://www.iitb.ac.in/en/education/academic-divisions
5. Indian Institute of Technology (IIT), Madras
Chennai https://www.iitm.ac.in
6. School of Physical Sciences National Institute of Science Education and Research (NISER), Bhubaneswar http://physics.niser.ac.in/
7. Department of Physics Panjab University Chandigarh http://physics.puchd.ac.in/
8. Division of High Energy Nuclear and Particle Physics
Saha Institute of Nuclear Physics (SINP) Kolkata http://www.saha.ac.in/web/henppd-home
9. Department of High Energy Physics Tata Institute of Fundamental Research (TIFR), Mumbai http://www.tifr.res.in/ ~dhep/
10. Department of Physics & Astrophysics
University of Delhi Delhi http://www.du.ac.in/du/index.php?page=physics-astrophysics
11. Visva Bharti Santiniketan, West Bengal 731204 http://www.visvabharati.ac.in/Address.html
India-CMS Constitution and Guidelines ................................................................................................ 7
Annexure - I ........................................................................................................................................... 8
Annexure - II .......................................................................................................................................... 9
India-CMS Logo Competition ...................................................................................................................... 12
Fabrication, Testing and Installation of CMS Detector Components by Indian Groups ............................. 13
I. HO Electronics ...................................................................................................................................... 13
II. Hadron Calorimeter (HCAL) Upgrade .................................................................................................. 14
III. Resistive Plate Chambers (RPCs) ........................................................................................................ 15
IV. Future Hardware Activities ................................................................................................................ 16
The GEM upgrade for the high eta region for the Long Shut Down -2 (2017-2020) .......................... 16
India-CMS in CMS Phase II Tracker Upgrade ...................................................................................... 16
Tier2 Center of India for the CMS Experiment............................................................................................ 17
It is pleasure to note few things about India-CMS on the occasion of this Newsletter. We are always proud to be
part of the LHC family as well as members of the India-CMS collaboration. It gives us a sense of togetherness to do
our Science in a Big way in spite of our diversity. The feeling of oneness provides the sustenance to carry on our
research in experimental high energy physics which is a ball-game complete different than other fields. Since the
Sun never sets in LHC-world, the LHC collaboration has changed our lifestyle considerably to be able to cope up
with the difference in time zones, the physical distance between India and the center of the activity as well as the
digital divide in terms of connectivity in practical sense.
The responsibility to steer the India-CMS collaboration came upon me quite unexpectedly and I did not have very
clear idea about what all needed to be done as a contact/liaison person from India for our country in a big
experimental collaboration like CMS at LHC. But when the call came I took up the job and gave my best. The
hurdles at times looked bothersome, but could be overcome with kind support of the colleagues in the
collaboration and efforts from various fronts. I am very thankful for this. One of the immediate realizations was
that we, from India, are lucky to be funded reasonably well to do our science. It also brought in the sense of
individual responsibility to deliver well, within constraints. I had to spend some time to understand the financial
aspects of the participation, to be able to prepare budget proposals for the 12th plan period. The preparation in
DAE institutes started early enough and the first draft of the combined budget proposal for India-CMS
collaboration was ready by the end of 2011. This proposal of course had several amendments by the time it got
approved in mid-2014. The India-CMS collaboration is a loosely bound system of various groups funded by DAE and
DST. Thereby the individual groups have reasonable freedom to choose their course and mode of contribution to
the CMS experiment within the purview of India-CMS collaboration. But the underlying coherence was remarkable
when it came to improving the general features of the collaboration. A more transparent way of decision making
and in the workings of the collaboration was brought in. The Executive Committee of India-CMS collaboration was
dissolved; all the scientists participated in deliberations. We discussed about the course of action as a whole when
deemed necessary. Various information, be it about the developments in the LHC, the CMS experiment or issues
regarding physics were being informed to all the members, including the students. A balanced picture of all the
achievements and the contributors were projected at every opportunity. A committee for drafting the constitution
of the India-CMS collaboration was formed during first quarter of 2011 and after several deliberations of the
members; the constitution was presented and discussed openly in detail among the scientists. This was then
submitted to the DAE-DST monitoring committee as well. For some time we had physics meetings conducted via
internet regularly. This have to restarted to be able to maximize the utility of local experts in the country and to
train the students better. Ultimately our impact in the collaboration is bound to be more visible. The presentations
and materials for physics meetings, conferences/workshops held are anyway made available on the web and
advertised. I think this helps the newcomers who are initially shy and struggle with the complexity of the
experiment. We also made the Tier2 Grid Computing center and the Tier3 facility at TIFR useful for analyses by
individuals by hosting simulation and collision data, needed for the Indian community. Sufficient storage space is
also provided for individual analyzers. The hindrance has been the relatively low bandwidth within the country to
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connect to TIFR-T2. With increasing bandwidth in near future the utility of the T2 and the T3 for Indian users is
expected to be much better in Run2 phase of LHC. The T2 is able to perform well at the CMS front because of
dedicated link between Mumbai and CERN. We have now Grid certificate authority within the country which
reduces the time needed for issuing new certificates or for renewal. As often said one has to be really lucky these
days to experience the history of particle physics in the making. It is not very often that a new facility of high
energy physics comes alive for doing science. The period of 2011 to 2013 was extremely significant in the life of
everybody associated with the LHC. I was lucky to be handling of some of the affairs in this context. There were lot
of excitements as Run1 data continued to pour in; during 2012 the centre of mass energy of LHC was increased
from 7 TeV to 8 TeV and the instantaneous luminosity kept increasing. As a consequence the collaboration
analyzed data as a sprinter and then in marathon mode; allowed mass range for the Higgs particle continued to
shrink, the first hints of a resonance finally culminated in the announcement of the discovery of the Higgs boson.
Within the collaboration the news was out few days before the scheduled announcement on 4 July, 2012. We
prepared statements in Hindi and other regional languages to be put up on CMS official website as well as for the
local media. Several hundred people across the world tuned to the video sessions to learn about announcement of
the discovery. The discovery changed the way civilization now understands the science the early universe. We did
reach out to the public explaining the LHC and the Higgs phenomenon as much as we could. The Nobel Prize for
physics in 2013 to some of the proponents of the mechanism for the electroweak symmetry breaking was an
acknowledgement of the triumph of human intellect: a hypothesis made 50 years ago getting confirmed at the
LHC. Basking in the glory, we learnt to defend our case for appreciation and continuation of support for basic
research. We look forward for more discoveries in future operations of the LHC. India has a long tradition of
research in particle physics and the thrust of the LHC has made our task of increasing the strength and the quality
of High Energy Physics community in India easier. The enthusiasm in the country is evident from the increase in the
number of people from India associated with the experiments at LHC. The LHC roadmap is drawn already for next
two decades and India is preparing to participate in all aspects of the future operations of the LHC in a bolder way.
Working in cohesion we can bring more glory to India. From past experience we realized that we must form an
Indian team from participating groups for specific analyses to be able to lead the related efforts all the way to the
publication in journal. This will help in better identification of our contribution in CMS physics.
Long live India-CMS collaboration!
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India-CMS Constitution
Final Version
Adopted on:4th April, 2013 during India-CMS faculty meeting at TIFR
Members of Drafting Committees:
Prof. Sudeshna Banerjee, TIFR, Mumbai
Prof. Brajesh Choudhary, Delhi University, Delhi
Prof. R. K. Choudhury, BARC, Mumbai (Retired & replaced by Prof. A. K. Mohanty)
Prof. Ajit Mohanty, BARC, Mumbai
Prof. Manjit Kaur, Panjab University, Chandigarh
India-CMS Constitution and Guidelines
Preamble:
This document defines the structure and governance for the members of the CMS collaboration from Indian
institutions. The Indian membership of CMS is designated as the India-CMS Collaboration.
The India-CMS collaboration consists of the physicists from high energy particle physics and nuclear physics
research groups at Indian universities and national laboratories who are committed to doing physics research at
the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) located at CERN, Geneva,
Switzerland. It forms the Indian component of the CMS collaboration which consists of over 41 countries
throughout the world. The CMS experiment is presently collecting data from proton-proton and heavy ion
collisions at ultra-relativistic (TeV) energies. There is a similar India-ALICE collaboration which also has multi-
institutional participation.
The present participating institutions (full members and Associate members) are given in Annexure I.
The purpose of the India-CMS collaboration is to facilitate the participation of Indian physicists in the CMS
experiment at the LHC in building detector hardware and R&D, in its operation, analysis and publication of physics
results derived from data collected by the CMS experiment, and the upgrade of the CMS sub-detectors for future
runs.
The India-CMS collaboration is participating in the overall activities of the CMS collaboration. In addition, the India-
CMS Collaboration, through its general body consisting of all faculty members, will decide on the scope and
direction of all activities that are carried out in the name of India CMS.
The Constitution of the India CMS Collaboration is a guideline document but its provisions are binding on the
members of the collaboration.
Collaboration organization:
The faculty, research staff and students from the participating institutions form the total membership of the
collaboration. The voting members of the collaboration are faculties and scientists who are registered at CERN and
have served CMS for at least one year. Engineers, technicians, and students in the collaboration, do not have
voting rights. Each organization nominates a Team Leader and a Deputy Team Leader to coordinate its activities.
They have to be members of the CMS collaboration, registered in the CMS secretariat at CERN.
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Within the India-CMS collaboration, a Spokesperson is elected to serve as the nodal person to carry out overall
coordination with CERN as well as with the Indian funding agencies.
Spokesperson:
The Spokesperson is elected by the voting members of the India-CMS collaboration. The term of the Spokesperson
will be for two years. An individual can be elected for a maximum of two terms as the Spokesperson in his/her
entire career. Under no circumstances one person can serve for more than two terms.
The Spokesperson will be elected through a process which is defined below:
Any voting member of the collaboration can nominate another voting member for the position of the
Spokesperson. The nomination should be then seconded by another voting member.
The election of the Spokesperson will be carried out by an Election Committee which will be constituted
with one member from each institute/university in the India-CMS collaboration. The committee has to be
formed in the India-CMS meeting preceding the meeting in which election will be held. The election
process will be completed at least three months before the expiry of the term of the current
Spokesperson.
During one of the meetings of the India-CMS collaboration the election will be held through secret ballot
and eligible voters present will vote.
Eligible members who are unable to attend the meeting can nominate any other person attending the
meeting to vote on their behalf. This information has to be given to the election committee and to every
voting member.
If someone who is unable to attend the meeting and does not wish to nominate anyone
to vote as proxy on their behalf, s/he can send her/his vote in a sealed envelope through another colleague or by
speed post and the envelope can only be opened at the time of vote counting. An e-mail should be sent to all
voting members telling how the vote is being sent.
S/he will be allowed to vote through e-mail, sent to every other voting member of the collaboration.
The result of the election will be announced in presence of all the voting members, right after the election
– after a suitable period of time which will be taken to count the votes.
For any reason, if the Spokesperson leaves CMS and the India-CMS collaboration before her/his term expires, the
Deputy Spokesperson will take over as the Spokesperson for the remaining time. If the remaining time left is more
than a year and a half out of the two year term then the term will count as full term for the person taking over as
the Spokesperson and s/he will be eligible for one more term only as the Spokesperson. In the same spirit, no
individual who is to retire within half the term of eligibility of perceived taking over as Spokesperson will be eligible
for the position.
Deputy Spokesperson:
The collaboration will nominate a Deputy Spokesperson to assist the Spokesperson in handling his/her duties.
His/her term will be concurrent with the Spokesperson. No one can hold the post of Deputy Spokesperson for
more than two terms during the entire career. For the present term (2013-15) the Deputy Spokesperson should be
nominated by the voting members of the India-CMS collaboration in the next India-CMS meeting and the term will
end with the present term of the Spokesperson. From the next term the Deputy spokesperson will be nominated
together with the Spokesperson.
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If for any reason the Deputy Spokesperson leaves the India-CMS collaboration before her/his term expires, the
senior most Professor or Scientist in a similar rank as the Professor will be nominated as the Deputy Spokesperson.
If the remaining time left is more than a year and a half out of the two years then the term will count as full term
for the person taking over as the Deputy Spokesperson and s/he will not be eligible for another term as Deputy
Spokesperson.
Collaboration Meetings:
There will be at least three collaboration meetings in a year, chaired by the Spokesperson or the Deputy
Spokesperson. Members are encouraged to attend the meetings and present the progress in their work. There
should be presentations from all the individual organizations on the status of the CMS related project taken up by
them. Physics presentations should also be made to summarize the results of data analyses that are being carried
out.
Physics Analysis Presentations:
Apart from the Collaboration meetings, the Spokesperson/Deputy-Spokesperson or their nominee are encouraged
to organize open Vidyo presentations on a regular basis to discuss the results of the physics analyses that are being
done by the members. This may be done on a fixed day, at a fixed time, pre-decided to suit the convenience of
collaborators from across India and those working at CERN.
Induction of New Member Organization:
New organizations willing to join the collaboration as members can write to the Spokesperson and join the
collaboration after meeting the requirements as enunciated in the document for induction of new members. The
details are given in Annexure II.
Deputations to CERN:
The deputation proposals to CERN for data taking shifts, M&O tasks, and physics analysis related work are
discussed in the joint DAE-DST CMS-ALICE Task Force Committee meetings, held twice a year, in December and
June. Member groups of India-CMS collaboration should submit their requests at least a month before the
meeting. Faculty members should provide a plan for visits to CERN more than two months prior to the visit for
themselves and their students. It is advisable that a student is properly supervised while stationed at CERN either
by his/her advisors, co-advisors or a senior collaborator with whom the student is working. Therefore, a work plan
should be carefully thought out and submitted when seeking approval for a visit. The Spokesperson should get the
visits sanctioned well in advance (November and May).
The actual period (less than or equal to the period sanctioned by the task force) of the visit should be left to the
discretion of the individual groups depending upon the need and resources available.
A regular visit to CERN can be extended if there is an urgent reason based on the nature of the work the member is
involved in, e.g. detector related emergency, critical stage in a physics analysis or an unforeseen meeting. If any
visit has to be extended, approval will be sought by email to the Spokesperson and the deputy Spokesperson
mentioning appropriate reasons. They will get the task force approval and make sure that approval is granted
within 3-5 days.
For the purpose of visits to CERN, January – June and July – December blocks should not be treated as disjoint sets.
Once the approvals are given, there should be some flexibility in joining the periods.
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Fund Allocation:
India-CMS collaboration is an umbrella project funded jointly by DAE and DST, India. The funding requirement is to
be submitted for each five-year plan to these agencies with the consolidated requirements from all the
collaborating organizations. The funds will then be allocated to the individual organizations depending on the
extent of their participation in the (i) hardware development and contributions to the CMS experiment, (ii) faculty
and student strength and (iii) evaluation of the performance during the previous plan period.
Procedures for Ratification and Amendments Any change in the constitution adopted shall be ratified by a two-third vote of all faculty members who are part of
the India-CMS collaboration. Subsequent amendments may become necessary as the experiment and need of the
collaboration evolve. Amendments can be proposed by any three members of the India-CMS collaboration to the
Spokesperson who will circulate it for discussion and voting will take place in the following India-CMS collaboration
meeting.
The India-CMS Spokesperson shall inform the Indian funding agencies, DAE and DST, of changes to the India-CMS
Constitution as necessary. Any decision made by a majority of the voting members of India-CMS will over ride any
decision taken by the Spokesperson/ Deputy Spokesperson.
Annexure - I
Full members:
1. Bhabha Atomic Research Center (BARC), Mumbai
2. University of Delhi, Delhi
3. Panjab University, Chandigarh
4. EHEP Group, Tata Institute of Fundamental Research (TIFR), Mumbai
5. HECR Group, Tata Institute of Fundamental Research (TIFR), Mumbai
6. Saha Institute of Nuclear Physics (SINP), Kolkatta
7. The School of Physical Sciences, National Institute of Science Education and Research (NISER), Bhubaneswar
8. Indian Institute of Science Education and Research (IISER), Pune
9. Indian Institute of Technology (IITM) Madras, Chennai
Associate member with the EHEP Group of TIFR
10. Visva Bharati (VB), Santiniketan
Associate member with NISER, Bhubaneswar
11. IIT Bhubaneswar (IITBh), Bhubaneswar
Associate member with BARC
12. IIT Bombay (IITB), Mumbai
Participants from these institutions are the faculty, research staff and students, who carry out the tasks detailed
above.
Annexure - II
Guidelines for New Groups to Join India-CMS Collaboration
It is the endeavour of India-CMS to promote groups in India to join the adventure of experimental high energy
physics through working in the CMS collaboration. Within India, the CMS related activity is organized through the
India-CMS collaboration which at present comprises the following groups: BARC, Mumbai, University of Delhi,
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Delhi, Panjab University, Chandigarh, TIFR-EHEP and TIFR-HECR groups at Mumbai, Saha Institute of Nuclear
Physics, Kolkata, NISER, Bhubaneswar, the Visva Bharati, Santiniketan and IIT, Mumbai. The funding is provided
jointly by DAE and DST. The major decisions within the collaboration are taken after discussion in the general
meetings of the collaboration and endorsement by the Faculty. India-CMS collaboration holds quarterly meetings
at one of the above institutions by rotation.
To formulate guidelines for new groups to join India-CMS collaboration, five member committee (Prof. J.B. Singh,
Prof. S. Dugad, Prof. A. K. Mohanty, Dr. G. Majumder, Dr. S. Bhattacharya) was formed during the Sept. 27-28,
2007 India-CMS Meeting at New Delhi. After deliberation on the matter committee has come up with the following
recommendations to be approved by the faculty.
Section A:
Guideline for Evaluating the Proposal from a New Group
The committee recommends applying the following general guidelines for the New Institutes, submitting proposal
to the India-CMS collaboration, to be admitted to India-CMS and decide accordingly.
1. Institute/University interested to join India-CMS collaboration should be well established with good
standing in the area of high energy and/or nuclear physics. However if the Institute/University does not
already have established experimental high energy and/or nuclear physics group, participating members
of the group willing to join India-CMS collaboration should have good standing in the area of
experimental high energy physics and/or experimental nuclear physics.
2. Institute/University should have a program (teaching and/or research) for M. Sc. in Physics and/or higher
level courses in Physics so that they will be able to attract research scholars to work on the CMS
experiment for their Ph. D. degree. Also, Institute/University should be authorized to admit and supervise
the research scholars in their work towards the PhD degree, or else should allow their students to get
registered with one of the existing India-CMS Institute/University to get their PhD degree.
3. Regarding joining India-CMS collaboration, the head of Institution (Director, Chairperson, Vice-Chancellor,
etc) should assure the normal institutional support such as space, deputation leave, etc. An official letter
from the respective institution authorities should be obtained in this regard. In order to make effective
participation, it should be understood by the sanctioning authority of institute/university that the staff
members would be expected to spend about 2-3 months/year away from their respective institution and
spend a significant fraction of their time for the CMS experiment throughout the year, and also develop
computing facilities specific to the CMS experimental activity at their home institution.
4. Any new group that wishes to join India-CMS Collaboration should constitute of at least two faculty
members. If it is only single person group, then that person can work through any of the existing group.
There should be a potential for the person to form minimum 2-3 members group in the near future (2-3
years) for their contribution in CMS to be more viable. Until then this group would be recognized as
Associate Member of the existing India-CMS group (as per CMS Constitution).
5. Members of the new Institute should have a background in experimental high energy physics /nuclear
physics and should have shown proven expertise in at least one of the areas such as hardware and/or
software and physics analysis. This potential can be judged from their past experience in experimental
high energy physics/nuclear physics. Members should have at least 3 years of post-doctoral experience in
the experimental high energy physics/ nuclear physics.
6. Members should mention explicitly about the area of interest in the CMS experiment including hardware,
software and physics analysis. While the primary hardware fabrication responsibility of India-CMS is
practically complete, Institute should be in a position to take up the hardware upgrade job or contribute
in the form of CMS service tasks like: software development for detector monitoring, operation, in-situ
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testing and calibration of detector, operation and maintenance of the CMS Tier-2/3 grid computing
system etc.
7. Members should explicitly mention other major research projects undertaken by them and specify how
much time each member can devote for the CMS experiment. Members should not be involved in more
than 2 Major Experiments.
8. Resources that would be brought to the India-CMS collaboration should be spelled out:
a) Human resources, in terms of FTE’s (full time equivalent) faculty or post-doc members who
would be committed to CMS work.
b) Participant groups are expected to work at existing India-CMS Institutes/Universities and
subsequently at CERN. How much time members can be available from their teaching schedule
to be deputed to other CMS Institutes within India and later on at CMS site?
c) The hardware/software Lab. Facilities/ space available within the Institute.
9. In order to make sure that new groups can contribute effectively towards the India-CMS effort, they
should be encouraged to contact existing groups and pursue India-CMS activities that are of mutual
interest to them. This will enable them to enter CMS activities and also allow a better assessment about
their capabilities of contribution to be made in the CMS experiment. This period should be about one
year. During this period, the present India-CMS group would pay their travel and stay expenses for a
reasonable length of stay at their institution (say 2-3 months).
10. Theoretical physicists or groups should not be admitted as an independent institute. However individual
theorists can be admitted as member of the existing India-CMS group, if she/he has reasonable expertise
in the Collider Physics phenomenology and agrees to take up CMS related service task mentioned in
Clause 6.
Section B:
Procedure for Inducting New Groups The committee proposes the following procedure for induction of new groups in the India-CMS collaboration:
New groups desirous of joining India-CMS collaboration would be expected to make an open presentation of
the proposal in India-CMS collaboration meetings, expressing their previous experience and possible activities
of interest in CMS experiment and submit a proposal including CV of each investigator.
Once the institute/university/group satisfy the above guidelines (Section A), it is to be approved in the faculty
meeting of the India-CMS collaboration. Then the steps mentioned below may be followed for the admission:
The group should adopt the procedure mentioned in Clause 9 and after one year, progress should be reported
to India-CMS for the evaluation of membership.
After successful evaluation of the progress, the India-CMS collaboration will approve their membership and the
India-CMS Spokesperson subsequently will write to the DAE and DST and ask for proper allocation of funds to
the New Institute.
The India-CMS spokes person will also take up the matter with the CMS management at CERN. The general
course for small groups joining is to admit them as Associate Members to one of the existing India-CMS groups
and, after a few years of satisfactory contribution, they could be considered for full membership of CMS as per
the guidelines of CMS collaboration.
A group with two members or less should be Associate Member of existing India-CMS group having more than
two members.
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Task Force Approval of the Constitution: 26th May, 2014, TIFR
Guidelines for Evaluating the Proposal from a New Group
Section A: The committee recommends applying the following general guidelines for the New Institutes, submitting proposal to the
India-CMS collaboration, to be admitted to India-CMS and decide accordingly.
1. Institute/University interested to join India-CMS collaboration should be well established with good standing in
the area of high energy and/or nuclear physics. However if the Institute/University does not already have
established experimental high energy and/or nuclear physics group, participating members of the group willing
to join India-CMS collaboration should have good standing in the area of experimental high energy physics
and/or experimental nuclear physics.
2. Institute/University should have a program (teaching and/or research) for M. Sc. in Physics and/or higher level
courses in Physics so that they will be able to attract research scholars to work on the CMS experiment for their
Ph. D. degree. Also, Institute/University should be authorized to admit and supervise the research scholars in
their work towards the PhD degree, or else should allow their students to get registered with one of the
existing India-CMS Institute/University to get their Ph.D. degree.
3. Regarding joining India-CMS collaboration, the head of Institution (Director, Chairperson, Vice-Chancellor, etc)
should assure the normal institutional support such as space, deputation leave, etc. An official letter from the
respective institution authorities should be obtained in this regard. In order to make effective participation, it
should be understood by the sanctioning authority of institute/university that the staff members would be
expected to spend about 2-3 months/year away from their respective institution and spend a significant
fraction of their time for the CMS experiment throughout the year, and also develop computing facilities
specific to the CMS experimental activity at their home institution.
4. Any new group that wishes to join India-CMS Collaboration should constitute of at least two faculty members
who are beyond their probation stage. If it is only single person group, then that person can work through any
of the existing group. There should be a potential for the person to form minimum 2-3 members group in the
near future (2-3 years) for their contribution in CMS to be more viable. Until then this group would be
recognized as Associate Member of the existing India-CMS group (as per CMS Constitution).
5. Members of the new Institute should have a background in experimental high energy physics /nuclear physics
and should have shown proven expertise in at least one of the areas such as hardware and/or software and
physics analysis. This potential can be judged from their past experience in experimental high energy
physics/nuclear physics. In general, members should have 3 years of post-doctoral experience in the
experimental high energy physics/ nuclear physics. In exceptional case, this condition can be waived by India-
CMS followed by Task Force.
6. Members should mention explicitly about the area of interest in the CMS experiment including hardware,
software and physics analysis. While the primary hardware fabrication responsibility of India-CMS is practically
complete, the new Institute should be in a position to take up the hardware upgrade job or contribute in the
form of CMS service tasks like: software development for detector monitoring, operation, in-situ testing and
calibration of detector, operation and maintenance of the CMS Tier-2/3 grid computing system etc.
7. Members should explicitly mention other major research projects undertaken by them and specify how much
time each member can devote for the CMS experiment. Members should not be involved in more than 2 major
ongoing experiments.
8. Resources that would be brought to the India-CMS collaboration should be spelled out:
a. Human resources, in terms of FTE’s (full time equivalent) faculty or post-doc members who would be
committed to CMS work.
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b. Participant groups are expected to work at existing India-CMS Institutes/Universities and
subsequently at CERN. How much time members can be available from their teaching schedule
to be deputed to other CMS Institutes within India and later on at CMS site?
c. The hardware/software Lab. Facilities/ space available within the Institute.
9. Theoretical physicists or groups should not be admitted as an independent institute. However individual
theorists can be admitted as member of the existing India-CMS group, if she/he has reasonable expertise
in the Collider Physics phenomenology and agrees to take up CMS related service task mentioned in
Clause 6.
Section B:
Procedure for Inducting New Groups
The committee proposes the following procedure for induction of new groups in the India-CMS collaboration:
(a) New groups desirous of joining India-CMS collaboration would be expected to make an open presentation
of the proposal in India-CMS collaboration meetings, expressing their previous experience and possible
activities of interest in CMS experiment and submit a proposal including CV of each investigator.
(b) Once the institute/university/group satisfy the above guidelines (Section A), it is to be approved in the
faculty meeting of the India-CMS collaboration. Then the steps mentioned below may be followed for the
admission.
(c) The India-CMS spokesperson will take up the matter with the CMS management at CERN. The general
course for small groups joining is to admit them as Associate Members to one of the existing India-CMS
groups and, after a few years of satisfactory contribution, they could be considered for full membership of
CMS as per the guidelines of CMS collaboration.
Regarding Budget
1. After recommendation of India-CMS for new group joining CMS, India-CMS spokesperson will inform the
Task Force and request for approval so that new group can ask for funding.
2. The funding request of a new group (both independent and associate) to DAE+DST should be forwarded
through India-CMS. It is mandatory for new group to keep provision in the budget for M&O component
(in proportion to the faculty strength if they join during the middle of a five year plan period) which will be
part of the India-CMS common fund. In case of independent group, there should also be budget request
for one time entry fee to be paid to CMS at CERN.
3. It is the responsibility of the new group joining as independent India-CMS member to arrange one time
entry fee as of when due either from the funding agency or from their own institute before registering at
CERN.
4. While the independent institute will register at CERN as new India-CMS institute, the associate member
will be listed under the host institute at CERN. This is only to facilitate the associate member to work at
CERN and also at host institute if host institute agrees. However, there is no financial obligation of host
institute for associate member. The associate member has to arrange his/her own funding as mentioned
above.
5. It is necessary for new groups to get their own funding including M&O as mentioned above when new
group joins during middle of a plan period. However, if there is delay in funding, India-CMS may consider
paying their M&O after obtaining Task Force and DAE approval.
19
India-CMS Logo Competition
During the last couple of years it was strongly felt by the groups
fabricating hardware for CMS experiment that India-CMS should
have a logo, which can be put on the hardware items/pieces, as is
the practice with most of the institutions from other countries.
At the last India-CMS meeting, held at Panjab University,
Chandigarh during 20-21 March, 2015, this idea was proposed and
was well received. Following this a logo competition was held in
which the India-CMS members were asked to send the logos
designed by them. A total of 16 logos were received. These were
evaluated by all faculty members in a confidential mode.
The logo designed by Mr. Varun Sharma, Department of Physics &
Astrophysics, University of Delhi was finally selected.
Compact Muon Solenoid (CMS) Achievement Award
20
Fabrication, Testing and Installation of CMS Detector Components by
Indian Groups
I. HO Electronics Contributed by Shashi Duggad (TIFR)
The HO detector was fabricated by two Indian groups, PU and TIFR. The
response of photo readout elements and HO detector to LED light
source, muons and pions at varying energy was extensively studied at
the H2 test-beam facility of CERN. Indian groups carried quality control
of HO detector, readout electronics, burn-in tests, installation and
commissioning of the HO detector. This was quite voluminous and
challenging activity involving large number of people from TIFR and PU.
Entire responsibility of HO fabrication, quality control, commissioning
took about 10 years and was completed in 2008.
The hybrid photo diode (HPD) was state of the art device when
decision about photo readout element for HCAL was taken around
1998. Performance of this device was certified by carrying extensive
tests under high magnetic field (4 Tesla) and high radiation dose.
However, when the cosmic data was taken during commissioning of CMS magnet, discharging tendencies of HPD
were observed only for the HPD’s in the HO detector. Detailed tests carried out to investigate this phenomenon
showed that HPD’s perform well at 4 Tesla (HPDs in HB experiences this field)), however they show instability
when subjected to lower magnetic field (0.1-1.0 Tesla). The discharging tendency of HPD’s in the HO detector
which experiences similar field, not only seriously compromises the life time of the device but also mimics the fake
signal of almost 50 GeV energy loss in the HO detector.
In view of this, CMS management in consultation with Indian groups decided
not to operate HPD’s in outer rings. HO detector in YB0 was operated at
lower voltage. Due to these problems that were identified in 2008-2009, the
HO detector could not be operated with its full potential. It was quite clear
that we need to replace the HPD’s with some other device to overcome this
serious problem. Around this period, significant development had taken
place in fabrication of Silicon Photo Multiplier (SiPM). It has large gain,
compact size and excellent photon detection efficiency. Several tests carried
out for dark count and photo response in presence of magnetic field varying
between 0-4 Tesla indicated feasibility of this device as a substitute for HPD.
Following this, several tests were carried out to study the response of HO
with SiPM as photo readout element for muons and pions. Excellent
Signal/Background ratio was observed for muons with SiPM (about 5
times higher than that of HPD). Test-beam activities at CERN were
coordinated by DESY, FNAL and TIFR. Panjab University and TIFR took
major responsibility of analyzing test-beam data for HO.
Figure 1. Mounting board containing 18 SiPM
Figure 2. Control board providing programmable bias voltage to 18 SiPM, voltage to Peltier cooler etc.
21
After carrying out these extensive studies CMS management decided to replace HPDs in all 5 rings with SiPM in
2009. Responsibility of designing, fabrication and quality assurance of control boards, bias voltage board and
mounting boards was jointly undertaken by Fermilab and TIFR with funding from DESY, FNAL and TIFR. 160 control
boards and bias voltage boards were fabricated indigenously by TIFR. Figure 1 and 2 show the control board and
mounting board consisting of 18 SiPM.
Several students from Panjab University and TIFR participated in carrying out burn-in tests at CERN, developing
analysis framework and analysis of the burn-in data. The last phase of installation of HO was completed by July
2014.
Fabrication of Si boards and installation
The Compact Muon Solenoid (CMS) detector has unique capabilities for the jet physics stemming from a full silicon
tracking system projected on a high precision electromagnetic calorimeter. The role of hadron calorimeter is not
only to serve as a full absorption energy measurement calorimeter but is more heavily devoted towards particle
identification and isolation methods. The Barrel Hadron calorimeter (HB) is complemented with a Outer Hadron
Calorimeter (HO). Outer Hadron Calorimeter is just outside the solenoid and inside the magnetic flux return yoke.
It provides an additional calorimeter coverage of about 3 λ thickness and ensures containment of highly energetic
hadron showers and thus works as a tail-catcher to improve the energy measurement of jets and missing
transverse energy. It used Hybrid Photo-diodes (HPD's) as a photo-detector during Run I of Large Hadron Collider
(LHC). However, due to the degraded performance of these HPD's, they were replaced by the next generation
photo-readout, Silicon Photo-Multiplier (SiPMs) during the long shutdown I (LSI).
The integration of SiPMs in the detector on such a large scale was done for the first time, so different aspects
needed for the successful running in Run II were studied. The functionality of SiPMs as a photo-readout element
should be established. To optimize the performance of SiPM in HO detector, studies have been carried out on
various aspects of characterization. Due to the different aperture size of the photo-detector, a coupling light guide
usually called light mixer is desired. Performance studies of different light mixers during various test beams were
carried out at CERN. SiPMs are not linear devices and their QIE saturates. So a study has also been made for the
choice of dynamic range and gain at which these SiPMs should operate during Run II. For the certification of the
SiPMs, different analyses were performed such as stability, pedestal, peltier, noise, self trigger. One of the main
issues with Hamamatsu SiPMs is to regulate its temperature with variation of only 0.1oC as SiPMs gain depends
linearly on the temperature with the relative dependence of 8% gain shift per oC at a foreseen operating over-
voltage of 1.5 V. The response of SiPM was studied for the stability through the fluctuations or variation in
temperature, current, pedestal with time. Breakdown voltage is a key parameter of a device as it limits the
operation under reverse bias. The variation of breakdown voltage of SiPMs with time was studied and the SiPMs
are found to be stable within 50mV. The relative variation in gain for PED runs with time was also studied. The
relative variation of gain for all channels and RMs is within 3% of the peak value. The good SiPMs, certified through
quality control and burn-in measurements, were installed in the CMS detector during LS1 shutdown and the
commissioning runs for the calibration and detection efficiency of HO have also been studied. The upgraded HO
with SiPMs will not only help in improvement of the hadronic energy measurements but can also allow the CMS
muon system to use HO data for a combined muon trigger. After the successful results of SiPMs in HO, the other
sub-detector like HB, HE and HF are also planned to include the SiPMs as photo-sensors in LS II shutdown.
22
II. Hadron Calorimeter (HCAL) Upgrade Contributed by Manoj Sharan (SINP)
The electronics of HCAL detector is being upgraded during the long
shutdown 1 (LS1). With the installation of SiPM devices for the barrel,
endcap and outer segments of the detector and a new photo-multiplier
for the forward detectors (HF), number of channels to be read out will
increase. In addition, the electronics is now more than 2 decades old and
to take advantage of latest technology (like micro TCA based systems
used in telecom industry for 3G and 4G) is being adapted for use in this
upgrade.
India has taken major responsibilities in development of these
technologies, testing and installation of these devices. The expertise
of industries, who have been active players in rolling out of 3G and 4G technologies for telecom industry, was leveraged
to develop, fabricate, do quality control and install these units. Indian groups (University of Delhi, Panjab University,
Visva Bharati and SINP) have made substantial contributions in two broad areas: 1) micro TCA based read out cards for
HF and 2) Optical Splitters for barrel and end-cap HB/HE detectors.
Micro TCA read out cards (uHTR cards): In collaboration with University of Minnesota, a prototype card was developed
in Bangalore based companies. These were then tested in beam and after 4 revisions; the final production cards were
made. This is a 14 layer PCB board using the 2 FGPGA devices. This needs 5 power modules which were fabricated
separately and requires separate burning and testing for 39 hours each. Around 200 numbers of such modules were
separately tested at Delhi, Panjab, Visva Bharati and
SINP. 60 uHTR cards have been fabricated and
installed at CERN in end of 2014. Currently
commissioning of these cards is going on and Indian
students have played a major role in testing,
commissioning of these cards. Some of the expertise
which the Bangalore based company Micro-pack
Limited developed was use of NELCO material for
high speed signal transmission and Gerber rotation
for signal integrity.
Optical Splitters for HB/HE Upgrade: With the
commissioning of new micro-TCA based electronics
for data taking (back-end), it is planned that the old
electronics (VME) is also retained for some time (at least one year) to check the performance and trigger calculations.
For doing this, signals from front-end need to be split. No standard solution existed and with a Mumbai based company
(PDR Videotronics), a prototype was designed and developed by the Indian groups. These units had to be efficient (signal
loss less than 4 db) and yet very compact to fit in the small space. The prototypes worked very well and the HCAL
operational groups ordered 6 more of these units and their performance was very good and consistent. 206 such units
have been shipped and installed at CERN.
Optical splitters for LS1 upgrade were crucial for the working of trigger with CMS HCAL back-end electronics. Students
and post-doc have played a major role in designing and testing for the last 3 years, to meet our partial commitment
towards LS1 upgrade (Figure 5).
Plans: Indian groups have worked together successfully with the industry to fabricate and commission these items for
HCAL upgrade. The groups are planning to take the responsibility for the development and deployment of control cards
Figure 3. Micro TCA read out card
Figure 4. The Optical splitter (above left) will split the signals between the existing VME based system and uTCA based system (above right) which has been made by Indian groups.
23
for Silicon photo-multiplier tubes to be installed for HCAL end-cap detectors. These cards have to meet the projected
radiation damage criteria and the initial goal is to make some prototypes and check them in test beam studies.
Figure 5. Indian students working for the installation of optical splitters. Also, this is the first unit bearing the India CMS logo along with the logos of participating institutes. The whole exercise was funded by University of Delhi, Panjab University, & Visva Bharti for the 210 optical splitters.
24
III. Resistive Plate Chambers (RPCs) Contributed by L. M. Pant (BARC) & J. B. Singh (PU)
Resistive Plate Chambers installed for the fourth layer of the Compact Muon Solenoid muon system at
the LHC facility at CERN
The CMS muon system consists of three different sub-detectors: RPCs (Resistive Plate Chambers), DT (Drift Tubes)
and CSC (Cathode Strip Chambers). The end-cap region is made of CSCs and RPCs in the first three disks and RPCs
are installed in the fourth disk as part
of the RE4 project (Resistive Plate
Chambers for the Fourth End-Cap).
The fourth station (called RE4) is
added to the CMS end-cap muon
system during the LHC Long Shutdown
(LS1 – 2013-2014). The construction of
the RE4 is an international project
carried out by teams from institutes in
Belgium, Bulgaria, China, Colombia,
Finland, Georgia, India, Italy, Korea,
Mexico and Pakistan as well as from
CERN. CERN plays an important role in
the chamber construction and testing
at the RPC laboratory located in
building 904 at Prevessin, where many
physicists, engineers, technicians and
students from around the world
worked together, along with the
assembly sites in Belgium (University of Ghent) and India (NPD-BARC, Figure 6 and Panjab University, Figure 7).
The RE4 layer on both sides of end-caps is instrumented with a total of of 72 super-modules, each of which is made
by two double-gap RPCs (Figure 8). A total of 200 RPCs (144 RPCs for installation and 56 RPCs as spares) were
required for the entire project. The super-modules were needed to be built and installed inside CMS detector
within a period of 24 months. A number of institutions involved with the RPCs covered all the tasks and worked
very hard in order to complete this project by the end of 2014. These tasks were distributed among the following
countries: Korea was responsible for the construction of 660 gas gaps and 10 chambers. Pakistan, Italy and Finland
worked on the front-end electronics, DAQ and power system, while India (NPD-BARC and Panjab University) built
and characterized 50 RPCs, apart from producing and testing 200 Cu cooling sets (MD & PDD-BARC) for the entire
collaboration. Bulgaria, Mexico and Georgia were responsible for super-module assembly and testing. India, Italy
and Pakistan were building the chamber services (gas, cooling and cabling). China provides the readout strips,
mechanical frame boxes and participated in the chamber construction and testing at CERN.
A large international team worked for the installation and commissioning of the full system. All the chambers were
assembled and tested at three different assembly sites: CERN, Ghent (Belgium) and India (BARC-Mumbai and
Panjab University). The students and technicians from Panjab University, Chandigarh also worked at NPD-BARC for
the assembly and characterization (Figure 9). The last set of RPCs was assembled and characterised at Panjab
University, Chandigarh, prior to their dispatch to CERN in April 2014. Students from Mumbai University have also
contributed for the project (Figure 11). At the assembly sites, quality control was performed on all chamber
Figure 6. The RE4 Chamber assembly and commissioning team at NPD-BARC.
25
components, which were then assembled in to the chambers with an average assembly rate of one chamber per
day. After the construction, each chamber was tested in a cosmic stand for about a week in order to study the
chamber performance. After a successful cosmic test, high voltage was applied to each chamber to power-on and
to monitor for about three weeks in order to check its stability over time. Afterwards, a pair of chambers was
assembled into a super-module. It was then sent to the CMS experimental site for installation. One of the end-caps
with 72
RPC detectors (36 super-modules) was installed in December 2013 (Figure 10) and the other one was installed in
May, 2014.
Figure 7. The RE4 Chamber assembly and commissioning team at Panjab University, Chandigarh.
Figure 8. The Super Module Assembly. The Cu cooling sets were built at MD&PDD-BARC
26
Figure 9. Students and technicians from PU, also collaborated in the assembly and characterization of RPCs at BARC.
Figure 10. Students from Mumbai University (M. Sc. Physics), as part of their project, involved with the Visual Inspection of the Gas-Gaps on their arrival from KODEL at BARC
Figure 11. The positive side of the RE4 (End Cap +) installed 100 metres below the ground, at Point 5 in Cessy, France is approximately 15 metres in diameter, weighing close to 5 tons.
27
IV. Future Hardware Activities
The GEM upgrade for the high eta region for the Long Shut Down -2 (2017-2020) Contributed by L. M. Pant (BARC) & Supratik Mukhopadhyay
1.6) of the CMS muon
stations. These detectors shall
be employed both for the
tracking and triggering
simultaneously and would use
Argon and CO2 gas mixtures
which are non-inflammable.
The high granularity
compounded with the high
count rate capability make
these detectors as forerunners
to be employed in the
extreme forward region of the
CMS detector, when it goes to
an order of higher Luminosity
after the Long Shut Down-2
(2017-2020). The heart of
Indian institutes (Delhi University, NISER-
Bhubaneswar Panjab University-Chandigarh and SINP-
Kolkata) have expressed their interests to help build
up a part of the muon forward region with GEMs. The
institutes have shown their interests in:
1. Hardware development
2. Simulations and reconstruction
Figure 12 shows the initial test results of a 10 cm x 10
cm single GEM foil procured from CERN at NPD-BARC
with x-rays from 55Fe and the responses with HV
variation for a similar set up (a triple GEM) at SINP-
Kolkata.
BARC emphasised the role of development of GEM
foils in India and had approached the following industries last year, explaining them the potential applications of
GEM technology in the field of high energy physics, medical imaging and homeland security.
Figure 12. Single GEM with voltage divider, gas flow in RPC Lab., NPD and the 5.9 x-ray peak from 55 Fe
Figure 13. Large area and segmented GEM foils required for the high eta upgrade of CMS
28
3. Alpha Pneumatics, Mumbai
The above industries have since then visited CERN/are planning to visit in 2015. CERN had been quite instrumental
in facilitating the free transfer of patented technology to M/s KIED and M/s Micropack, who have already visited
CERN last year to get acquainted with the recipes, tools and techniques for rolling the GEM foils in India. Figure 13
show
Optimization studies of triple-GEM device for its application in the upgraded muon system of CMS experiment are
undertaken at Saha Institute of Nuclear Physics (SINP). These include the detailed simulation and measurement of
the device characteristics such as electronic gain, transparency, time and spatial resolution. A systematic
investigation of the gain and transparency with Ar+CO2 mixture has been completed. The next phase of work will
be started after procurement of Ar+CO2+CF4 mixture. A sophisticated multichannel high voltage supply SY4527 has
been installed to provide voltages to each GEM stages individually replacing a distribution circuit used earlier. This
would be useful to optimize the device response with fine tuning of the field configuration.
Single Mask GEM foil development in India:
There are various techniques available
around the globe for making punch through
holes for Micro Pattern Gas Detectors
(MPGDs), such as Gas Electron Multipliers
(PMMA/kapton) (5/50/5). At present these
foils are developed in South Korea without
having any adhesive between the Cu and
polyimide. The available techniques range
from chemical etching, reactive plasma
etching and laser etching. However, for GEM
detectors, having an active area upto 5000
cm2, the chemical etching process using a
Single Mask has been developed at CERN
which is faster from the viewpoint of mass production of such foils for the upgrades which are foreseen in a couple
of years with the Large Hadron Collider facility at CERN.
BARC (NPD), a member to RD51 collaboration too, had been instrumental in free transfer of patented technology
from CERN for the development of Single Mask GEM foils with Indian industries. Both the dry etching and wet
etching processes are being explored with different industries. After about a dozen of iterations, the wet etching
at M/s Micropack at Bangalore and BARC (NPD) will continue with its efforts in this direction in developing large
sized foils. As an alternative technique reactive ion etching (dry etching), process is also being developed
parallely using Sulphur Hexafluoride + Oxygen plasma (SF6 + O2 plasma) for developing small sized foils on a
faster scale.
An intense x-ray source (Au target) with associated shielding for absorbing x-ray fluorescence and safety features is
also operational at BARC (NPD) which can fully illuminate a GE1/1 and similar sized detectors (Figure 15). Civil work
is in progress to develop a class 100 (hundred) volume (8 m x 5 m x 3 m) enclosed inside a class 1000 (thousand),
Figure 14. Process stabilization of 100 µm size hole, with a pitch of 200 µm, through chemical etching
29
for handling indigenously developed foils
and translating them into a triple GEM
amplifier and characterizing them.
Adequate gases, gas mixers and mass flow
controllers, which are GEM specific, along
with VME based DAQ with 1k of TDC
channels already exists in the lab. A GE1/1
3/1/2/1 mm gap spaci
channels) is expected to arrive at BARC
(NPD) very soon.
Figure 16. The GE1/1 detector with 8 η segments, 3/1/2/1 mm gap spacing and ~ 4k readout channels
Figure 15. Remote controlled x,y,z positioner of the intense x-ray source inside lead shielding for illuminating GE1/1 and similar sized detectors at BARC (NPD)
30
India-CMS in CMS Phase II Tracker Upgrade Contributed by Gagan Mohanty (TIFR)
After first long shutdown (LS1), covering the last two years, the experiments at the large hadron collider (LHC) are
back in action since June and recording proton‐proton collision data at a higher center-of-mass energy of 13 TeV.
Future planning for the LHC and injector chain foresees two such long shutdowns: LS2 and LS3. In the period
through LS2 (2019), the injector chain will be improved to deliver very bright bunches into the LHC, and the
instantaneous luminosity will go up to twice the design value. During LS3 (2023‐2024), the LHC itself will be
upgraded with new low-β triplets and crab cavities to optimize the bunch overlap at the interaction region
achieving a record-breaking luminosity mark of 1035 cm-2s-1. The data-taking period after LS3 or Phase-II is also
called the high-luminosity phase of the LHC (HL-LHC).
The present tracking system of the CMS experiment needs to be replaced with new detectors to improve or at
least maintain the physics performance in the monstrous pileup conditions of the HL‐LHC. Especially, the detectors
in the outer tracker as well as pixel detectors would be unable to cope with even the first few years during that
operation. The current tracker was designed to operate without any loss in efficiency up to an integrated
luminosity of 500 fb−1 and an average pileup of less than 50 per bunch crossing. In addition to these design
limitations, there will be further constraints from the data acquisition (DAQ) and trigger systems that need
significant upgrades to cope with the interaction rate and latency to take a Level-1 (L1) decision. The main
requirements for the tracker upgrade are:
a) radiation tolerance
b) increased granularity
c) improved two-track separation
d) reduced material budget
e) robust pattern recognition
f) compliance with the L1 trigger upgrade
g) extended acceptance.
This provides a unique opportunity for the India-CMS Collaboration to participate and significantly contribute
towards building of the upgraded tracker for Phase II. Five participating India-CMS groups viz. TIFR (Mumbai), SINP
(Kolkata), DU (Delhi), IITM (Chennai) and NISER (Bhubaneswar) have come together to form the so-called “India-
CMS Tracker Consortium”. The consortium is involved in several R&D activities ranging from sensors, mechanics,
module design and construction, DAQ, and system tests. Various ongoing and planned activities along with the
involved groups are given below.
Silicon sensor R&D (DU, TIFR): The DU and TIFR groups plan to collaborate with the Bharat Electronics Limited
(BEL) in Bengaluru. DU is contributing to the silicon strip sensor design for the Phase II Tracker by complementing
the measurements done at various institutes with the device simulation. The results are much appreciated within
the CMS Phase II Tracker sensor working group. They are part of the CMS silicon sensor simulation group, and
would continue to participate in optimizing the design of n-in‐p strip sensors and in their radiation damage
modeling. The work done by DU is included in the recently released “Technical proposal” for the phase-II upgrade.
In the past, the DU group had collaborated with BEL and BARC on successful development and characterization of
millistrip silicon sensors for the CMS preshower detector. Recently, the group has been involved in the design of
single-sided AC coupled microstrip sensors on 4” wafers at BEL. Some of these fabricated sensors have been
characterized in Karlsruhe and results are found to be satisfactory. The feedback obtained will be useful for the
future strip sensor processing at BEL. The TIFR group has been successful, for the first time in India, in producing 4”
single‐sided AC coupled microstrip sensors [JINST 9 (2014) P06008]. Initially, they developed a prototype sensor of
31
different width and pitch combinations on a 4” wafer. After finding suitable test procedures for characterizing
these AC coupled sensors, they fine-tuned various process parameters in order to produce sensors of the desired
specifications. Now the group wishes to take the existing collaboration with BEL a step ahead towards R&D with 6”
sensors. Given their shared interest, the TIFR and DU groups would like to collaborate in this activity. The CMS
Tracker sensor working group is willing to help the Indian institutes and industries for the sensor R&D in all
possible manners. A successful collaboration in this area will provide a big boost to the Indian silicon industry.
Sensor test and qualification (DU, NISER): The DU group is equipped with basic sensor characterization setup that
needs major improvement in order to be qualified as a CMS sensor qualification center (SQC). The group is
planning to expand its capabilities to multi‐strip measurements, which need many additional systems to be
procured and developed. With a team of dedicated students and project fellows, they have the required
experience and expertise to develop such a setup. The DU group is aiming to be an SQC for the Phase II CMS
Tracker Si strip sensors. The NISER group, relatively new to the game, plans to set up a dedicated clean room
facility with the sensor characterization setup and would be able to assist DU in this area of activities.
Module production and qualification (TIFR, SINP, IITM): The TIFR group strongly desires to set up a module
assembly and test center in Mumbai. They have much of the necessary equipment such as an automatic Delvotec
wire‐bonder, high-resolution inspection microscopes and 3D coordinate measuring machine. They also have plans
to procure a glue‐dispensing robot, cold chuck etc. The TIFR workshop has requisite skill to fabricate various
precision assembly jigs under a careful supervision of their engineering and technical team. They have acquired a
good deal of expertise on such high‐precision mechanics during their participation in the silicon vertex detector
assembly for the Belle II experiment. The group is already collaborating with the teams at CERN and DESY on the
design of the module frame and support structures, especially for the 2S modules of the outer barrel tracker. They
plan to set up necessary infrastructure for carrying out mechanical and thermal measurements in Mumbai. In
collaboration with the local industries, they are also exploring the fabrication of Al-CF bridges and spacers.
Preliminary exercise has been largely successful and they are working on further optimization. In addition to
module mechanics, the TIFR team is working on the assembly of mechanical prototype of the tracker module. This
important exercise will establish their engineering and technical capabilities for being a module assembly center.
The SINP group wishes to complement TIFR’s effort by setting up a DAQ setup to test the modules. They are
already a part of the Tracker DAQ group and have been contributing in some aspects like test‐beam analysis and
monitoring software etc. They are developing the digitizer for the Phase II Tracker. An in-house test setup will be
an important tool to tune the parameters. The objective here will be to work in tandem to get ready for the
module qualification while TIFR concentrates on the module integration aspects. Once experienced enough the
setup will be replicated at TIFR. If the plan goes well, there will be two test centers to qualify tracker modules. The
IITM group, another new entrant, is exploring the possibility of carrying out a part of the module assembly
activities in Chennai.
Development of track trigger (NISER, SINP, TIFR): NISER, SINP and TIFR groups are interested to participate in the
development of the L1 tracking and track trigger. A member of the TIFR group has some experience in FPGA
programming. The SINP group is already working on the simulation of AM based tracking at L1. The SINP and TIFR
groups have experience of an effective collaboration with the Indian Electronics industry where micro-HTR cards
with power and control mezzanines for the CMS Hadron Calorimeter were fabricated successfully. We would like
to set up a test stand for the development and testing purpose and to explore the possibility of production of
electronic components in the Indian industries. We are interested in contributing to the development of track
fitting algorithm to be implemented on the FPGAs of the backend electronics boards.
32
Tier2 Center of India for the CMS Experiment
The Tier2 (T2) center of India for CMS experiment, named T2-IN-TIFR, is located at TIFR, Mumbai (Figure 17). It is a
national contribution to CMS computing as well as a national facility for the scientists in the country participating
in the experiment. It is functional since 2008 on 24X7 basis and has an average reliability and availability of about
95%.
According to the LHC grid computing model at the
inception, the world-wide LHC computing grid is
based on the hierarchical structure with CERN as
the CMS Tier0 connecting to 7 Tier1 sites which, in
turn, connects to about 45 T2 sites. The backbone
of the distributed Grid computing is wide area
networking with high speed. With rapid increase in
available bandwidth and increased traffic among
T2s, the structure has changed from hierarchical to
planar in recent years.
T2 centres are used for both Monte Carlo event
generation, as well as for storage of simulated and
collision data meant for analyses by the
experimental collaboration. The site availability and reliability is monitored via WLCG metric. These datasets are
accessed by members of CMS collaboration from all parts of the world using the Grid authentication of CMS virtual
organization. A T2 centre also provides end-user support for scientists of the host country.
The T2-IN-TIFR centre is equipped with
about 800 computing cores
(equivalent to 7K HS06) and about 1
Petabyte of storage at present. This
corresponds to, respectively, 1% and
3% of total CMS resources.
The recent enhancement in computing
hardware has led to increased
utilization of the T2 in terms of job
execution as displayed in Figure 18. All
the users from India-CMS have
dedicated storage areas in the T2. The
centre is presently connected with
CERN by a dedicated point-to-point
link of 4 Gbps which will be
upgraded soon to 10 Gbps.
At CERN end the connection is peered with other T1 centres. The recent CMS data traffic across T2-IN-TIFR is
presented in Figure 19. The hardware resources and the infra-structure of the centre is upgraded in phases, while
the middleware and other software upgrades are taken up on continuous basis. Thus a lot of human efforts is
Figure 17. The Tier 2 Center at TIFR, Mumbai
Figure 18. Number of jobs executed in T2-IN-TIFR during July 2014 to July 2015
33
crucial to maintain the
performance of the T2 at
satisfactory level though mostly
invisible. It also supports a T3
centre where all the members of
India-CMS can perform their
individual analyses.
The dedicated link also serves for
the ALICE T2 centre at VECC,
Kolkata as well as other research
centres in the country as given in
the network diagram in Figure 20.
TIFR is the host institute to handle
the network related issues and is
the liaison between India and
CERN.
The connectivity with CERN has enabled the
centre to be part of LHCONE network
consortium from phase on. LHCONE is
supported by majority of world’s NRENs and
connects to majority of WLCG sites.
With the evolution of LHC data access model
(Any time, Any data, Anywhere) and improved
network connectivity, it has become easier for
T3 users to access the Grid resources. The
LHCONE connectivity is now being extended to
other participating institutes from India who are
part of Indian-WLCG collaboration, using a
virtual private network via NKN.
The service of the T2 towards CMS computing is
rewarded against mandatory service job for
CMS experiment by the host institute. T2-IN-
TIFR has been earning significant credits every
year; in 2014 it was among the top 5 in CMS.
Figure 19. Data traffic across T2-IN-TIFR during August 2014 to July 2015
Figure 20. Schematic of Network structure at T2-IN-TIFR
34
Publications
Detector Notes
1. Saturation study of HO with SiPM readout for the choice of dynamic range and gain, CMS DN-2015/015
2. Commissioning and performance of Outer Hadron Calorimeter, CMS DN-2014/019
3. CMS Technical Design Report For the MuonEndcap GEM Upgrade, CMS-TDR-2015, (Contribution in
Chapter 6 )
4. Commissioning and performance of the CMS Hadron Outer Calorimeter, CMS DN14019
5. Simulation of Silicon Devices for the CMS Phase II Tracker Upgrade, CMS DN-2014/016
6. Calculation of HCAL sampling factors, DN-2014/033
7. Saturation Study of HO with SiPM readout for the choice of Dynamic range and gain, CMS DN-2015/015
8. Inclusion of Hadron Outer Calorimeter in Particle Flow Calibration, CMS DN-2014/026
9. Test results of 8 μ HTR cards (v1.3) for HCAL Forward back-end electronics upgrade at SINP, CMS DN-
2014/009
10. Simulation of the Shashlik Detector for the ECAL Endcap Upgrade, CMS DN - 2014/003
11. Power & Control Mezzanine testing (at SINP) for HCAL back-end upgrade for Run2 of LHC, CMS DN-
2014/007
12. Use of tracking in the CMS L1 trigger for the phase-2 upgrade, CMS DN-2014/002
13. Comparison of Single Particle Response in Data and MC at sqrt(s) = 8 TeV, CMS DN-2014/030
Journal Publications
1. Alignment of the CMS tracker with LHC and cosmic ray data, JINST 9 P06009, Published 6th June 2014
Conference Reports
1. Simulations of Inter-Strip Capacitance and Resistance for the Design of the CMS Tracker Upgrade, CMS
CR-2014/126
2. Development of Radiation Damage Models for Irradiated Silicon Sensors Using TCAD Tools, CMS CR-
2014/120
3. Assembly & Characterization Of Resistive Plate Chambers In India For The Cms Detector, CMS CR-
2015/039
35
Contribution of Indian Groups to CMS Physics
a) Forward and Small-x QCD Physics
The activities of this PAG are grouped into 3 categories:
Topics: Pomeron- and photon-induced interactions (soft & hard)
Publications & Public Results
1. Double parton-scattering and multiple parton interactions in ATLAS+CMS, CMS CR-2013/312, PoS EPS-
HEP, 438, (2013).
2. DPS studies using same-sign W boson pair production in dimuon final state with the CMS detector, CMS
AN-14-196/PAS FSQ-13-001
3. Study of observables sensitive to double parton scattering in W + 2 jets process in p-p collisions at sqrt(s) =
7 TeV, CMS PAS FSQ-12-028
4. DPS measurements using W + 2-jet events, CMS Analysis Note CMS AN-13/078 (2013).
5. Measurement of Double Parton Scattering using W + 2 jets process, CMS Analysis Note, CMS AN-
2012/297 (2012).
6. Study of double parton scattering via W + 2 jet process using CMS detector at LHC, CMS CR-2015/036
7. DPS studies using same-sign W boson pair production in di-electron and electron-muon final states, CMS
AN-2015/012 (2015).
8. Study of double parton scattering using W + 2-jet events in proton-proton collisions at sqrt(s) = 7 TeV,
JHEP03, 032 (2014).
9. Measurement of electroweak production of two jets in association with a Z boson in proton-proton
collisions at √s = 8 TeV, Eur.Phys. J. C, 75-66, (2015).
10. Measurement of exclusive Upsilon photo production in PbPb collisions at 5.02 TeV with CMS, FSQ-13-009.
b) B Physics and Quarkonia
The areas in this group include:
o Quarkonium Production
Bottomium States, Charmonium States
o B and BB Production
Inclusive Measurements, B0 and B+ Production, B0s Production, B+c Production
o B Meson Decays
B → K(∗)μ+μ−,B0s→μ+μ−
o Baryons
o Spectroscopy, Exotic States
36
Publications & Public Results
1. Observation of B_s —> µ+ µ- and search for B^0 —> µ+ µ- with the 2011 and 2012 data, CMS AN-13-009
2. Angular analysis of B+/- —> K*+/- µ+ µ- at CMS, CMS AN-12-066
3. Angular analysis of B+/- —> K+/- µ+ µ- at CMS, CMS AN-14-244
4. Measurement of BS0->µ+ µ- branching fraction and search for B0->µ+ µ-
with the CMS Experiment, Phys. Rev.
Lett. 111, 101804 (2013).
5. Observation of the rare BS0->µ+ µ- decay from the combined analysis of CMS and LHCb data, Nature 522,
68-72, (2015)
c) Standard Model Physics (Vector Bosons & Jets)
The last century saw a remarkable progress of our understanding about the elementary constituents of
matter and the nature of fundamental interactions they corroborate to. The experimental results of
last few decades established the Standard Model (SM) of particle physics on firm footing by
confirming the predictions of the theory. The march of SM continued in LHC era though the machine
was not designed a priori for such a job. The high luminosity of LHC, essential for resolving the issue of
electroweak symmetry breaking, produces large number of pile up events in the detector. But carefully
designed experiments for discovering Higgs boson produced, as a by-product, spectacular results of
QCD and electroweak physics. Indian groups have been involved in all aspects in multiple
analyses> Starting with the study of charged and neutral Drell-Yan processes, to production of W and
Z in association with multiple jets or photon to QCD oriented photon+jet productions to jet
productions, a whole range of topics has been covered. The following list indicates the publications
where Indian groups have contributed significantly.
Publications & Public Results
1. Measurement of φ∗ variable in Drell–Yan events in pp collisions at sqrt(s) = 8 TeV in CMS experiment,
CMS-AN-14-007/SMP-15-002.
2. Rapidity distributions in exclusive Z+jet and gamma + jet events in pp collisions at sqrt(s)=7 TeV, CMS
Collaboration, Phys. Rev. D., 88.112009 (2013).
3. Jet energy resolution with Z (µ+µ−)+jet events at √s = 7 TeV, CMS AN-2012/366
4. Measurement of the Z0/gamma* + Jet Angular Distributions in pp Collisions at sqrt(s) = 7 TeV with the
Electron Decay Mode, CMS AN2012/135.
5. Differential cross section of jets associated to Z boson in Proton-Proton Collisions at √s=8 TeV, CMS AN-
2013/049
6. Differential cross section of jets associated to W boson in Proton-Proton Collisions at √s = 8TeV, AN-
2013/418
7. Subjet Multiplicities at LHC Energies and the QCD Color Factor Ratio CA/CF, doi:10.1155/2013/585809
8. Measurement of multijet cross-section ratios in pp collisions at √s = 8 TeV, CMS AN-2015/102
9. Measurement of Vector Boson Scattering and search for new physics at CMS with √ s= 13 TeV, CMS AN-
2015/068
10. Measurement of WW+WZ cross section and investigation of anomalous gauge boson couplings in semi-
leptonic decays in pp collisions at √s=8 TeV, CMS AN-2012/464
11. Measurement of WW+ 2-jet production at √s = 8 TeV and investigation of events with vector boson fusion
topology, CMS AN-2012/466
12. Measurement of electroweak vector boson productions in pp collision at CMS detector, LHC, CMS CR-
2014/193
37
13. Search for W W γ and W Zγ production and constraints on anomalous quartic gauge couplings in pp
collisions at √s = 8 TeV, Phys. Rev. D 90, 032008, CMS-SMP-13-009, CERN-PH-EP-2014-046.
14. Measurement of WW+WZ cross section in semi-leptonic decays in pp collisions at √s = 8 TeV, CMS AN-
2012/464
15. Study of Pileup Removal Algorithms for Jets, CMS AN-2014/175
16. Pileup Mitigation Techniques, CMS AN-2013/348
17. Study of Pileup Removal Algorithms for Jets, CMS Collaboration, CMS PAS JME-14-001
18. Measurement of single, double and triple differential production cross sections of Z boson in association
with jets in pp collisions at √s= 8 TeV, CMS PAS SMP-14-013
19. Differential cross section measurements of W bosons produced in association with jets in proton-proton
collisions at √s= 8 TeV, CMS PAS SMP-14-023
20. Z γ to νν γ cross section and anomalous gauge couplings at 8 TeV, PAS SMP-13-001 21. Z-> γ cross section in the MET+photon channel at 7 TeV, J. High Energy Phys. 10 (2013) 164,
arXiv:1309.1117, PAS SMP-12-020
22. Measurement of triple-differential cross section for gamma+jet production in proton-proton collisions at
sqrt(s) = 7 TeV, CMS AN 2011/331, CMS-PAS-QCD-11-005.
23. Measurement of the Production Cross Section for Pairs of Isolated Photons in pp collisions at sqrt(s) = 7
TeV, CMS AN 2011/070, CMS AN 2011/071, JHEP 01 (2012) 133.
24. Measurement of the differential cross section for isolated prompt photon production in pp collisions at
sqrt(s) = 7 TeV, Phys. Rev. D 84, 052011 (2011).
25. Measurement of the Isolated Prompt Photon Production Cross Section in pp Collisions at sqrt(s) = 7 TeV,
Phys. Rev. Lett. 106, 082001 (2011).
26. Measurement of the Underlying Event Activity in Proton-Proton Collisions at 0.9 TeV, Eur. Phys. J. C70:555,
2010.
27. Measurements of Inclusive W and Z Cross Sections in pp Collisions at sqrt(s)=7 TeV, JHEP 01 (2011) 080.
28. First Measurement of Hadronic Event Shapes in pp Collisions at sqrt (s)=7 TeV, Phys. Lett. B 699 (2011) 48-
67
29. Measurement of WW Production and Search for the Higgs Boson in pp Collisions at sqrt(s) = 7 TeV, Phys.
Lett. B 699 (2011) 25-47.
30. Measurement of the lepton charge asymmetry in inclusive W production in pp collisions at sqrt(s)= 7 TeV,
JHEP 04 (2011) 050.
31. Measurement of Wγ and Zγ production in pp collisions at sqrt(s) = 7 TeV, Physics Letters B 701 (2011)
535}
32. Missing transverse energy performance of the CMS detector, JHEP 09 (2011) 109
33. Measurement of the Inclusive W and Z Production Cross Sections in pp Collisions at sqrt(s) = 7 TeV, JHEP 10
(2011) 132
34. Measurement of the Drell-Yan Cross Section in pp Collisions at sqrt(s)= 7 TeV, JHEP10(2011)007
35. Jet Production Rates in Association with W and Z Bosons in pp Collisions at sqrt(s)= 7 TeV, JHEP 01 (2012)
010.
36. Measurement of transverse momentum of dimoun system at the LHC at sqrt(s)= 8 TeV, CMS PAS EWK-12-
025
37. Measurement of the production cross section for Z gamma to nu bar nu gamma in pp collisions at sqrt(s) =
7 TeV and limits on ZZ gamma and Z gamma gamma triple gauge boson couplings,
http://arxiv.org/abs/1309.1117.
38. Measurement of the differential and double-differential Drell-Yan cross section in proton-proton collisions
at 7 TeV, CMS PAS EWK-11-007
38
d) Top Physics
The areas in this category are:
o Cross Section Measurements
tt¯ Production, Dilepton, Lepton+Jets, All Jets, tt¯ + Jets, tt¯ + Vector Bosons, Single Top
Production, t-Channel, tW-Channel
o Mass Measurements
o Properties
tt¯ Charge Asymmetry, tt¯ Mass Difference, W Helicity, Spin Correlations
Width
o Searches
High-Mass tt¯ Resonances, Four Top Production, FCNC
Publications & Public Results
1. Measurement of the top-quark mass in leptonic decays of t-channel single top events at 8 TeV at CMS,
CMS AN-2014/194
2. Measurement of the single top t-channel inclusive cross section at 13 TeV, CMS AN-2015/114
1. Search for High Mass Resonances and New Physics with a DiTau Pair at √s = 8 TeV, CMS AN-2014-257
2. Search for high mass exotic resonances decaying to WW in the semi-leptonic channel, CMS AN-2013/139
3. Search for new resonances decaying to WW →ℓνqq-bar in the final state with a lepton, missing transverse
energy, and single reconstructed jet, CMS Collaboration, CMS PAS EXO-12-021
4. Search for new phenomena in monophoton final states in proton proton collisions at sqrt(s) = 8 TeV,
arXiv:1502.02522 (submitted to Phys Lett B, PAS EXO-12-047)
5. Search for Dark Matter and Large Extra Dimensions in pp Collisions Yielding a Photon and Missing
Transverse Energy, Phys. Rev. Lett. 108, 261803 – Published 27 June 2012 arXiv:1204.0821 PAS EXO-11-
096
6. Search for excited leptons in proton proton collisions at √s = 8 TeV, PAS EXO-14-015 7. Search for excited leptons in pp collisions at √s = 7 TeV, Phys. Let. B, Volume 720, Issues 4–5, 26 March
2013, Pages 309–329
41
8. A Search for excited leptons in pp Collisions at √s = 7 TeV, Phys. Lett. B, Volume 704, Issue 3, 13 October
2011, Pages 143–162, 1107.1773 (hep-ex), PAS EXO10016
9. Search for excited quarks in the photon + jet final state in proton-proton collisions at sqrt(s) = 8 TeV, AN-
2013/218, CMS PAS EXO-13-003 ,arXiv:1406.5171, Phys. Lett. B 738 (2014) 274.
h) Heavy-Ion Physics
1. Y(nS) production in 5.02 TeV PbPb collisions, HIN-13-003, JHEP 04, 103 (2014)
2. psi(2S) meson production in PbPb collisions at 2.76 TeV, HIN-12-007, PRL 113, 262301 (2014).
3. Y(nS) production in PbPb collisions in different kinematic regions, HIN-15-001,
4. Studies of dijet transverse momentum balance and pseudorapidity distributions in pPb collisions at
5. Studies of jet quenching using isolated-photon + jet correlations in PbPb and pp collisions at sqrt(s[NN]) =
2.76 TeV, HIN-11-010, Phys. Lett. B 718, 773–794, (2013).
6. Jet momentum dependence of jet quenching in PbPb collisions at sqrt(sNN)=2.76 TeV, HIN-11-013, Phys.
Lett. B 712, 176–197, (2012).
7. Heavy Ion Physics from CMS, J. Phys.: Conf. Ser. 455 012023 doi:10.1088/1742-6596/455/1/012023,
(2013)
42
Awards / Achievements / Distinctions (under the India-CMS umbrella)
No. Name Institute/University Award/ Distinction Month-Year
1 Dipanwita Dutta BARC, Mumbai DAE Science and Technical Excellence award
2013
2 L. M. Pant BARC, Mumbai DAE Science and Technical Excellence award
2011
3 Prashant Shukla BARC, Mumbai DAE Science and Technical Excellence award
2013
4 Brajesh Choudhary DU, Delhi Member Publication Committee - CMS Collaboration
2010 to 2011
5 Brajesh Choudhary DU, Delhi Member Publication Committee – Exotica Board – CMS Collaboration
2012 to 2013
6 Brajesh Choudhary DU, Delhi Member Publication Committee – TOP-BPH Board – CMS Collaboration
2014 to 2015
7 Brajesh Choudhary DU, Delhi Invited to Chair plenary session: "QCD Physics" at Recontres de Moriond QCD and High Energy Interactions, La Thuile, Italy
March 2011
8 Seema Sharma IISER, Pune Co-convener of Inclusive SUSY Searches (SUSY Physics Analysis Group)
Jan 2014 to present
9 Monika Mittal PU, Chandigarh CMS HCAL Achievement Award 2014
10 Sanjay Swain NISER, Bhubaneswar Co-convener of "properties BPH sub group"
STUDIES OF THE DRELL-YAN PROCESS IN THE CMS DETECTOR AT THE LHC
2012
32 Sandeep Kaur PU, Chandigarh Suman Bala Beri & V Bhatnagar
STUDY OF Z(->μμ) +JETS AT √ s =13 TEV (TENTATIVE)
2014
33 Arnab Purohit SINP, Kolkata Satyaki Bhattacharya Study of properties of the Higgs boson using its diphoton decay mode
2014
34 Asim Roy SINP, Kolkata Satyaki Bhattacharya & Sunanda Banerjee
Search for physics beyond the Standard Model in gamma+MET final state in proton proton collisions, using the Compact Muon Solenoid Detector at the Large Hadron Collider
39 Shamik Ghosh SINP, Kolkata Satyaki Bhattacharya Seach for new phenomena in final states with a single photon and missing transverse energy in p-p collisions
Measurement of Inclusive Jet Cross-Section in proton-proton Collisions at √s = 13TeV using the CMS Detector at the LHC
2012
42 Suvankar Roy Choudhury
SINP, Kolkata Subir Sarkar & Sunanda Banerjee
Study of the properties of the Standard Model Higgs boson in the H → ZZ → 4l final states in proton-proton collisions at √s = 13-14 T eV using the CMS detector at the LHC
2013
43 Bibhuprasad Mahakud TIFR, Mumbai G B Mohanty Search for new physics using fully hadronic final states at LHC
2011
44 Nairit Sur TIFR, Mumbai T. Aziz Search for the exotic charged Z(4430)+ state in the CMS detector
2010
45 Muzamil Ahmad Bhat TIFR, Mumbai T. Aziz * 2015
46 Soureek Mitra TIFR, Mumbai T. Aziz Measurement of the t-channel single top cross section and top quark mass using single top events in CMS experiment at
2010
51
LHC
47 Sandeep Bhowmik Viswa Bharati Manas Maity Study on Strong Interaction in pp Collisions with the CMS Detector
48 Tanmay Sarkar Viswa Bharati Manas Maity *
52
* To be decidedTalks presented in Conferences/Symposia/Workshops
Name Institute/University Title of Talk Conference/ Workshop/School
Month-Year
1 Abdulla Abdulsalam
BARC Upsilon production in pp, pPb and PbPb collisions at CMS
Quark Matter 2014, GSI, Germany
May 2014
2 Abdulla Abdulsalam
BARC Measurement of prompt psi(2S) to J/psi yield
ICPAQGP-15, VECC, Kolkata
February 2015
3 Dipanwita Dutta BARC Minimum Bias, MPI and DPS, and Diffractive and Exclusive measurements at CMS
ICHEP, Valencia, Spain July 2014
4 Dipanwita Dutta BARC Exclusive and Diffractive results from CMS
DAE Symposium, Nuclear Physics, Varanasi
December 2014
5 L. M. Pant BARC Single Mask GEM Foil Development in India
RD51 Collaboration Meeting, VECC, Kolkata 2014
October 2014
6 L. M. Pant BARC CMR RPC Performance and Upgrade
International Workshop on Advanced Detectors, VECC, Kolkata 2014
October 2014
7 Pawan Netrakanti BARC Overview of Jet measurements with CMS
ICPAQGP-15, VECC, Kolkata
February 2015
8 Prashant Shukla BARC Quarkonia and Heavy Flavour production with CMS
Int. Conf. on Matter at Extreme Conditions, Bose Institute, Kolkata
January 2014
9 Prashant Shukla BARC Upsilon measurements by CMS PbPb collisions
ICPAQGP-15, VECC, Kolkata
February 2015
10 Ruchi Chudasama BARC Exclusive photo-production of upsilon in pPb collisions with the CMS
ICPAQGP-15, VECC, Kolkata
February 2015
11 Vineet Kumar BARC Overview of Quarkonia measurements with CMS
ICPAQGP-15, VECC, Kolkata
February 2015
12 Ajay Kumar DU, Delhi Probe of WW Production in vector boson fusion topology
April Meeting of the American Physics Society, Savannah, GA (USA)
April 2014
13 Ajay Kumar DU, Delhi Measurement of electroweak vector boson production in pp collision at CMS detector, LHC
Second Annual LHCP Conference, Columbia University, New York City (USA)
June 2014
14 Ajay Kumar DU, Delhi Measurement of electroweak vector boson pair productions in pp collision at CMS detector, LHC
New Perspectives Conference, Fermilab (USA)
June 2014
15 Arun Kumar
DU, Delhi Search for a heavy Higgs boson in H → ZZ→ 2l2ν channel in pp collisions with CMS detector at LHC
46th Recontres de Moriond, La Thuile, Italy
March 2014
53
16 Ranjeet Dalal
DU, Delhi Simulations of Hadron Irradiation Effects for Si Sensors Using Effective Bulk Damage Model
24th RD-50 Conference, Bucharest, Romania
June 2014
17 Ranjeet Dalal DU, Delhi TCAD Simulations of Irradiated Si Sensors
25th RD-50 Conference, CERN (Switzerland)
November 2014
18 Shivali Malhotra
DU, Delhi Model Independent search for new physics with pp Collisions at CMS
Contemporary Trends in High Energy Physics and Experimentation, Chandigarh, Panjab University
March 2014
19 Shivali Malhotra DU, Delhi Measuring the Properties of the Higgs boson at CMS
ICHEP 2014, Valencia, Spain
July 2014
20 Shivali Malhotra DU, Delhi Measurement of the Properties of the new (Higgs) boson
Particles and Nuclei International Conference (PANIC), Hamburg, Germany
August 2014
21 Varun Sharma DU, Delhi Resonance search for quark excitation in the gamma + jet final state at CMS
ICHEP 2014, Valencia, Spain
July 2014
22 Pradeep Sarin IITB, Mumbai Heavy ion physics from CMS
International Workshop on Discovery Physics at the LHC, Kruger park, South Africa
December 3-7, 2012
23 Prolay Kumar Mal NISER, Bhubaneswar Search for the Higgs invisible decays at the LHC
XXI DAE-BRNS HEP Symposium, IIT Guwahati
December 8-12, 2014
24 Prolay Kumar Mal NISER, Bhubaneswar Search for the Higgs boson in the associated production excluding ttH (Run 1 results & Run 2 perspective)
25th Workshop on Weak Interactions & Neutrinos, Heidelberg, Germany
June 8-13, 2015
25 Sanjay K Swain NISER Bhubaneswar Recent B-physics results from LHC (CMS, ATLAS and LHCb)
LHC physics and beyond, Vietnam
2014
26 Sanjay K Swain NISER Bhubaneswar Recent results on B->K*µµ with CMS data
DAE Symposium, IIT Guwahati
2014
27 Sanjay K Swain NISER Bhubaneswar Flavor Physics at LHC CERN-Bangladesh LHC school
2014
28 Ankita Mehta PU, Chandigarh Double parton scattering studies via di-boson processes using the CMS detector at LHC
XXI DAE-BRNS High Energy Physics Symposium 2014, Indian Institute of Technology, Guwahati
December, 2014
29 Amandeep Kaur Kalsi
PU, Chandigarh Granularity Studies
GEM Workshop IX, at CERN
July,2014
30 Genius Walia PU, Chandigarh Measurement of phi* variable in Drell-Yan events in p-p collisions with 8 TeV data
XXI DAE-BRNS High Energy Physics Symposium 2014, Indian Institute of Technology, Guwahati
