Mitchell Institute for Fundamental Physics and Astronomy
Texas A&M University
&
Kyungpook National University
Electroweak and Compressed SUSY Event
at the LPC
Fermilab, April 29, 2015
Teruki Kamon
April 2016 1CMS via VBF/ISR
Compressed Mass Scenarios via
VBF Dijet and ISR Jet Tagging at
the LHC
Questions
Teruki Kamon 2
What do we do with (i) really heavy 1st/2nd generation squarks and/orgluino, and (ii) small DM (mass difference between NLSP and LSP)?
How can we probe Compressed SUSY Scenarios at hadron collides?1) Tagging energetic jets (+ MET) from cascade decays2) Tagging leptons3) Tagging photons4) Tagging with timing, vetexing5) ISR jet, VBF dijet
ISR jet tagging VBF-like dijet tagging
CMS via VBF/ISR
Let me give you a private viewon ISR and VBF
Selected Papers on ISR and VBFJ.F. Gunion and S. Mrenna, “A study of SUSY
signatures at the Tevatron in models with near
mass degeneracy of the lightest chargino and
neutralino”, PRD62 (2000) 015002 [9906270]
Yang Bai and Tim M.P. Tait, “Inelastic Dark
Matter at the LHC”, PLB 710 (2012) 335
[1109.4144] (MonoJet + Decay Vertex)
Ning Zhou, David Berge, Daniel Whiteson, “Mono-
everything: combined limits on dark matter
production at colliders from multiple final
states”, PRD 87 (2013) 095013 [1302.3619]
Chengcheng Han, Archil Kobakhidze, Ning Liu,
Aldo Saavedra, Lei Wu and Jin Min Yang,
“Probing light higgsinos in natural SUSY from
monojet signals at the LHC,” JHEP 02 (2014)
049 [1310.4274]
Pedro Schwaller and Jose Zurita, “, Compressed
electroweakino spectra at the LHC “. JHEP 03
(2014) 060 [1312.7350]
Howard Baer, Azar Mustafayev, Xerxes Tata,
“Monojets and mono-photons from light
higgsino pair production at LHC14”, PRD 89
(2014) 055007 [1401.1162]
Zhenyu Han, Graham D. Kribs, Adam Martin,
Arjun Menon, “Hunting quasi-degenerate
higgsinos”, PRD 89 (2014) 075007 [1401.1235]
Howard Baer, Azar Mustafayev and Xerxes Tata,
“Monojet plus soft dilepton signal from light
higgsino pair production at LHC14”, PRD 90
(2014) 115007 [1409.7058]
Zhenyu Han and Yandong Liu, “MT2 to the
rescue -- searching for sleptons in
compressed spectra at the LHC”, PRD 92
(2015) 015010 [1412.0618]Teruki Kamon 3CMS via VBF/ISR
Selected Papers on ISR and VBFA. Datta, P. Konar, and B. Mukhopadhyaya,
“Invisible charginos and neutralinos from
gauge boson fusion: a way to explore anomaly
mediation”, PRL 88 (2002) 181802.
G. Giudice, T. Han, K. Wang, and L.T. Wang,
“Nearly degenerate gauginos and dark matter
at the LHC”, PRD 81 (2010) 115011
B. Dutta, A. Gurrola, W. Johns, T. Kamon, P.
Sheldon, K. Sinha, “Vector boson fusion
processes as a probe of supersymmetric
electroweak sectors at the LHC”, PRD 87 (2013)
035029 SUS-14-005
A.G. Delannoy, B. Dutta, A. Gurrola, W. Johns, T.
Kamon, E. Luiggi, A. Melo, P. Sheldon, K. Sinha,
K. Wang, S. Wu, “Probing dark matter at the
LHC using vector boson fusion processes”,
PRL 111 (2013) 061801 SUS-14-019
B. Dutta, W. Flanagan, A. Gurrola, W. Johns, T.
Kamon, P. Sheldon, K. Sinha, K. Wang, S. Wu,
“Probing compressed top squarks at the LHC
at 14 TeV”. PRD 90 (2014) 095022.
B. Dutta, T. Ghosh, A. Gurrola, W. Johns, T.
Kamon, P. Sheldon, K. Sinha, K Wang, S. Wu,
“Probing Compressed Sleptons at the LHC
using Vector Boson Fusion Processes”, PRD
91 (2015) 055025 [1411.6043]
A. Berlin, T. Lin, M. Low, L.-T. Wang, “Neutralinos
in Vector Boson Fusion at High Energy
Colliders”, PRD 91 (2015) 115002 [1502.05044]
B. Dutta, A. Gurrola, K. Hatakeyama, W. Johns, T.
Kamon, P. Sheldon, K. Sinha, S. Wu, Zhenbin Wu,
“Probing Compressed Bottom Squarks with
Boosted Jets and Shape Analysis”, PRD 92,
(2015) 095009 [1507.01001] SUS-14-019
Teruki Kamon CMS via VBF/ISR 4
5
Selected Papers on ISR and VBF
Marco Cirelli, Filippo Sala, Marco Taoso, “Wino-like Minimal Dark Matter and future colliders”, JHEP
10 (2014) 033, Erratum-ibid. 01 (2015) 041 [1407.7058]
More … but I simply didn’t have a chance to update ….
Inspired by this workshop:
Teruki Kamon CMS via VBF/ISR
6
“VBF” Cross SectionsPRL 111 (2013) 061801
100 TeV14 TeV8 TeV
Tathagata Ghosh, Aspen 2015
Teruki Kamon CMS via VBF/ISR
7
“VBF” Cross Sections [II]Tathagata Ghosh, Aspen 2015
100 TeV14 TeV8 TeV
A. Berlin, T. Lin, M. Low, L.-T. Wang, “Neutralinos in Vector Boson
Fusion at High Energy Colliders,” PRD 91 (2015) 115002
[1502.05044]
agree
Teruki Kamon CMS via VBF/ISR
100 TeV
14 TeV
“VBF” luminosity, stronger as Ecm goes up.
ISR Invisible vs. VBF Invisible
VBF-like jet pair, pT,j1, pT,j2 > 50 GeV, |η| < 4.7, ηj1*ηj2 < 0, ∆ηjj > 4.2, and Mjj > 1100 GeV; Df(j1,j2) < 1.0
MET > 130 GeV Central jet veto (event that has an
additional jet with pT > 30 GeV and pseudorapidity between those of the two tag jets); Lepton veto with pT > 10 GeV.
One energetic jet, pT > 110 GeV, |h| < 2.4, and allow an additional jet (pT > 30 GeV)
MET > 250 GeV 500 GeV Veto event if j3 pT > 30 GeV; Veto
event if Df(j1,j2) > 2.5 Veto event if they contain isolated
electrons or muons with pT > 10 GeV; or hadronic tau with > 20 GeV
EPJC 75 (2015) 235 [1408.3583],
CMS-EXO-12-048, CERN-PH-EP-2014-164
EPJC 74 (2014) 2980 [1404.1344], CMS-HIG-13-
030, CERN-PH-EP-2014-051
8Teruki Kamon CMS via VBF/ISR
CMS Preliminary
9
ISR Invisible vs. VBF Invisible
Lepton IDBetter withlow pT, large h
Z/W ratio ~ 3 Z/W ratio ~ 1/2
Teruki Kamon CMS via VBF/ISR
DM particles have the direct couplings to the SM Higgs boson sector, H➝cc; (a) Limits on branching fraction of Higgs to “invisible” particles used for limits on DM, (b) Scalar, vector or fermionic couplings, (c) Limits only up to DM mass Mc < MH/2
10
Higgs portal to DM: H(inv)EPJC 74 (2014) 2980 [1404.1344], CMS-HIG-13-030, CERN-PH-EP-2014-051
Good S/B ratio
Poor S/B ratio
Teruki Kamon CMS via VBF/ISR
Teruki Kamon 11
VBF SUSY/DM EFT vs. VBF H(inv)
VBF-like jet pair, pT,j1, pT,j2 > 50 GeV, |η| < 4.7, ηj1*ηj2 < 0, ∆ηjj > 4.2, and Mjj > 1100 GeV
MET > 130 GeV Df(j1,j2) < 1.0 Veto events with an identified
electron, or muon with pT > 10 GeV. Central jet veto (event that has an
additional jet with pT > 30 GeV and pseudorapidity between those of the two tag jets)
CMS-SUS-14-019 PAS arXiv:1404.1344, CMS-HIG-13-030, CERN-PH-EP-2014-051, EPJC 74 (2014) 2980.
CMS via VBF/ISR
VBF-like jet pair, pT,j1, pT,j2 > 50 GeV, |η| < 5, ηj1*ηj2 < 0, ∆ηjj > 4.2, and Mjj > 750 GeV
MET > 250 GeV Df(MET,j2) > 0.5 Veto events with an identified
electron, or muon with pT > 10 GeV; tau with pT > 15 GeV;
Central jet veto (event that has an additional jet with pT > 30 GeV or b-tagged jet with with pT > 20 GeV, and pseudorapidity between those of the two tag jets)
c
c
(Dirac Fermion)
R. C. Cotta, J. L. Hewett, M. P. Le, T. G. Rizzo,
Phys. Rev. D 88, 116009 (2013) [1210.0525]
d = 5 Higgs portal operator ccVV
Teruki Kamon 12
VBF SUSY vs. VBF H(inv)
CMS vis VBF/ISR
Z/W ratio ~ 2 Z/W ratio ~ 1/2
Mjj [GeV]
Next Gen. Searches via VBF
XMETjj
The final state is same as invisible Higgs signal, but larger pT jets
Cross section? Wino-like DM Bino-Higgsino DM
Example, disappearing tracks?
13
CMS-EXO-12-034, JHEP 01 (2015) 096 [1411.6006] Search for
disappearing tracks in events with jet pT > 100 GeV, MET > 100
GeV for direct production of C1N2 and C1C1.
Teruki Kamon CMS via VBF/ISR
14
“Long-Lived” (LL) Interpretations
[EXO-13-006, EPJC 75 (2015) 325] “Constraints on the pMSSM, AMSB model and on other models from the search for LL charged particles in proton-proton collisions at sqrt(s) = 8 TeV”.
[EXO-12-034, JHEP 01 (2015) 096] Search for disappearing tracks in proton-proton collisions at sqrt(s) = 8 TeV” … Disappearing tracks (as a signature of LL particle decaying inside the CMS detector) are identified as those with little or no associated calorimeter energy deposits and with missing hits in the outer layers of the tracker. Limits are set on the cross section of direct electroweak chargino production in terms of the chargino mass and mean proper lifetime.
Teruki Kamon CMS via VBF/ISR
15
Wino DM with ISR, VBF and DTMarco Cirelli, Filippo Sala, Marco Taoso, “Wino-like Minimal Dark Matter and future colliders”, JHEP 10 (2014) 033, Erratum-ibid.
01 (2015) 041 [arXiv:1407.7058v2]
!
Teruki Kamon CMS via VBF/ISR
16
Light Higgsinos in MonoJetDetecting light Higgsinos in ISR jet tagging (Monojet events)”. See arXiv:1310.4274(*), for example. See also the next page. We see a reach at ~200 GeV at 14 TeV ( 100 TeV?)
(*) Chengcheng Han, Archil Kobakhidze, Ning Liu, Aldo Saavedra, Lei Wu and Jin Min Yang, “Probing
light higgsinos in natural SUSY from monojet signals at the LHC,” JHEP 02 (2014) 049
[arXiv:1310.4274]
Teruki Kamon CMS via VBF/ISR
A. Berlin, T. Lin, M. Low, L.-T. Wang, “Neutralinos in Vector Boson Fusion at
High Energy Colliders,” PRD 91 (2015) 115002 [1502.05044]
Wino and Higgsino via VBF
Teruki Kamon 17CMS via VBF/ISR
Given a systematic uncertainty of 5% with 3000 fb−1[LHC14] 125 GeV Winos and 55 GeV Higgsinos
[100 TeV] 750 GeV Winos and 180 GeV Higgsinos
We want to lower lepton pT threshold and cover larger h coverage for future detector.
[Comments]
The forward detector system (tracking, calorimeter, muon) must be good for lepton veto and vertexing for forward jets.
Ultra-fast timing on forward calorimeter for trigger?
Central tracking, calorimeter, muon – lepton ID from 5 GeV??
Teruki Kamon 18
3rd Generation Squark
SUS-14-001 [1503.08037]
JHEP 06 (2015) 116 SUS-13-009 (monojet stop)
SUS-13-015 (stop)
SUS-13-018 (sbottom)
12
3 4
1 2 3 4
1
2
3
4 3
CMS SUSY and X
CMS Preliminary
VBFSUS-14-019
Teruki Kamon 19
Compressed 3rd Generation Squarkhttps://twiki.cern.ch/twiki/bin/view/CMSPublic/PhysicsResultsSUS14001
JHEP06(2015)116 [1503.08037]
250 GeV
MonojetSUS-14-001
CMS SUSY and X
MonojetSUS-14-001
VBFSUS-14-019
315 GeV250 GeV
250 GeV 315 GeV
Teruki Kamon 20
ISR vs. VBF in Case of Compressed SUSY
MonojetSUS-14-001
VBFSUS-14-019
CMS SUSY and X
VBF PRD 92 (2015) 095009 [1507.01001]
541 GeV at 95%CL for 50PU
VBF jj + sbottomsISR jet + sbottoms?ISR g + sbottoms?
Haipeng An and Lian-Tao Wang, arXiv:1506.00653
The search feasibility for stop events in M(stop) – M(chi) >~ 20 GeV, where a pair of stops are produced in association with a hard jet.
The investigated region includes the region in VBF stop paper(arXiv:1312.1348, PRD 90 (2014) 095022)
See Fig. 3. On the line for M(chi) = M(stop) – M(top), the 5-sigma reach is 400 (600) for 300 fb-1 (3000 fb-1) in ISR tagging, while we could obtain those reaches via VBF.
Stops in Monojets
Teruki Kamon 21
David Shih: http://arxiv.org/abs/1506.07885
Hagiwara: http://arxiv.org/abs/1307.1553
12 3 4
CMS SUSY and X
315 GeV(8 TeV)
Teruki Kamon 22
Electroweak (EWK) Sector
x = 0.5 (maximum sensitivity)
Wino-Chargino and Bino-LSP
Up to ~700 and ~300 GeV for light slepton case
Up to 320 and 100 GeV for W and Z cases
Lower limits for heavy slepton
being Higgsinos
small mass difference
(compressed spectra)
CMS via VBF/ISR
SUSY VBF + MET + 2 Leptons
The first SUSY search of its kind in VBF topology (Inclusive muon trigger and diTau trigger
mu-mu, mu-e, mu-tau, tau-tau ; OS & LS
[SUS-14-005, JHEP 11 (2015) 189] “Search for supersymmetry with the
vector boson fusion topology in proton-proton collisions at /s = 8 TeV”
Teruki Kamon 23
Run 2: VBF + soft lepton triggers (see Sho Maruyama’s talk)
CMS via VBF/ISR
SUSY VBF + MET + 2L
Teruki Kamon 24
MG5, |Dh| > 4.2QCD2QED2 + QCD0QED4
SUS-14-005 SUS-14-005
CMS via VBF/ISR
SUSY VBF 2L vs. Direct 3L
Teruki Kamon 25
MG5, |Dh| > 4.2QCD2QED2 + QCD0QED4
SUS-13-006
EPJC 74 (2014) 3036 [1405.7570]SUS-14-005
x = 0.5 (maximum sensitivity)x ~ 0.95 (maximum sensitivity)
CMS via VBF/ISR
SUSY + Another Higgs Wanted MSSM Higgs (e.g., A H and H+H-), Non-MSSM Higgs
Colored Sectors
Gluinos
Heavier(?) 1st/2nd generation scalar quarks (squaks)
Lighter(?) 3rd generation squarks (stop, sbottom)
Charginos (C1, C2), Neutralinos (N1, N2, N3, N4), decaying into: Leptons, Higgs, W, Z
LSP? Lightest Neutralino (N1): Bino-like, Wino-like, Higgsino-like,
Bino-Higgsino-like ..[Example] Higgsino LSP chargino and neutralinosbelow 200 GeV, with mass splittings of order 10 GeV. It is very difficult for LHC to observe these particles. Gravitino
Sleptons Selectrons and smuons - mass degenerate? Special case: Stau is lighter.
Displaced Tracks
Long-Lived (LL)
RPV + ???
Compressed scenarios at hadron collides
Teruki Kamon 26CMS via VBF/ISR
“VBF” luminosity, stronger as Ecm goes up.
Physics menu with VBF dijet and ISR jet tagging: Invisible, Higgsino, Wino, Stop, Sbottom, Slepton
Central tracking, calorimeter, muon – lepton ID from 3-5 GeV??
The forward detector system (tracking, calorimeter, muon) must be good for lepton veto and vertexing for forward jets.
Ultra-fast timing on VF calorimeter for trigger?
Summary
Teruki Kamon 27CMS via VBF/ISR