David Hitlin DOE Annual Review June 29, 2009 1 Super B The Super Flavor Factory David Hitlin DOE...

David Hitlin DOE Annual Review June 29, 2009 1

SuperB The Super Flavor

Factory

David HitlinDOE Annual Review of Caltech

June 29, 2009


SuperB – the Super Flavor Factory

The Caltech group led the way in recognizing the importance of continuing e+e- flavor studies substantially beyond the level of BABAR and Belle

The crucial role that flavor physics will play in understanding New Physics found at the LHC is becoming ever more clear to the community

There is clear discovery potential Lepton flavor violation New sources of CP violation Rare b,c and decays that will be crucial to interpreting New

Physics found at the LHC Sensitivity to New Physics at scales accessible to the LHC requires a

large data sample: 50-75 ab-1 ⇒ luminosity of 1036 = 15 ab-1/year

SuperB, proposed for construction at or near the INFN Frascati laboratory,can provide this luminosity with low power consumption and manageable backgrounds, using a novel collider concept: Very low emittance rings, similar to the ILC damping rings and a

new final focus scheme – the crabbed waist The design includes a linearly polarized electron beam (LER), which

provides unique capabilities in studies of production and decay

David Hitlin DOE Annual Review June 29, 2009 3SuperB Perugia June 2009

3

Antonio Masiero at the June 2009 Perugia Workshop


Primary physics objectives of a Super Flavor Factory

Perform measurements in the flavor sector such that: If new particles are discovered at LHC we are able to study the

flavor structure of the New Physics If the New Physics scale is beyond the reach of the LHC,

explore the New Physics scale

More specifically Is there charged lepton flavor violation (LFV) ? Are there new CP-violating phases in b,c or decay ? Are there new right-handed currents ? Are there new loop contributions to flavor-changing neutral currents Are there new Higgs fields ? Is there new flavor symmetry that elucidates the CKM hierarchy ?

BABAR provides an excellent base for an upgraded detector that can address these questions in the SuperB 1036 asymmetric e+e- environment


Charm FCNC

Charm mixing and CPVB Physics: (4S)

PhysicsBs Physics: (5S)


The SuperB machine design is evolving

John Seeman – miniMAC April 2009


Crabbed waist beam distribution at the IP

Crab sextupoles

OFF

Crab sextupoles

ON

waist is orthogonal to the axis of bunch

waist moves to the axis of other beam

All particles from both beams collide in the minimum y region, with a net luminosity gain

E. Paoloni


Crabbed waist has been convincingly tested at DANE


Klaus Balewski (DESY), John Corlett (LBNL), Jonathan Dorfan (SLAC, Chair),Stuart Henderson (ORNL), Tom Himel (SLAC), Claudio Pellegrini (UCLA),Daniel Schulte (CERN), Ferdi Willeke (BNL), Andy Wolski (Liverpool, phone),Frank Zimmermann (CERN)

Closeout report of the second miniMAC review - April 24, 2009…. “Mini-MAC now feels secure in enthusiastically encouraging the SuperB design team to proceed to the TDR phase, with confidence that the design parameters are achievable”

The design takes as a constraint the re-use of PEP-II magnet and RF components

Many details of the design, of course, remain to be worked out. We aim for a TDR at the end of 2010, with an intermediate report by the end of 2009

The March 2009 design has been reviewed by the SuperB Machine Advisory Committee



Prospects for SuperB The CERN Strategy Group has “taken note” that the SuperB

project is consistent with the European HEP roadmap INFN is working for a funding decision in 2009

The Region of Lazio has committed funds for a tunnel and associated structures, contingent upon Italian central government approval

An excellent bid (15K€/m) for the tunnel + associated structures is in hand

P5 recommended US participation in an overseas B Factory in Scenario B or above

INFN has requested PEP-II and BABAR components from DOE The project has published a CDR

and a physics update Work is now underway on

comprehensive TDR volumes on the accelerator, detector and physics performance – end of 2010

A Progress Report will be issued by the end of 2009

320 signers80 institutions


SITES : Tor Vergata……..


LNF option


SuperB Experimental Hall & Transfer Line

-+


Caltech’s role in SuperB and the US (proto)collaboration

We originated the concept of a 1036 e+e- collider in February, 2001 and ran a year-long workshop “The Discovery Potential of a Super B Factory at 1036 Luminosity” in 2003

Caltech has been instrumental in organizing the SuperB project and is heavily involved in the TDR activities: David Hitlin is Deputy Director, a member of the Steering Committee,

and has been co-convener of the EMC group Frank Porter will become co-convener of the EMC group in the Fall Ren-yuan Zhu is leading development of LYSO crystals for SuperB and

SLHC Chih-hsiang Cheng is the fast simulation EMC developer Alexander Rakitin is optimizing the design of the backward calorimeter We are playing an important role in preparations for a beam test of an

LYSO crystal array of anticipated for November 2009 We will play a leading role in organizing a US detector/physics

collaboration when the project is approved by INFN and DOE agrees to US participation Currently active: Caltech, Cincinnati, LBNL, Maryland, SLAC, …. We anticipate a US contingent of ~100 members


Rearendcap

Possible barrel

extension

Forwardendcap


Fast simulation of 2M BKs events

→

C.-h. Cheng


B decay: stringent limits on New Physics A. Rakitin

Search for a lepton from decay + missing energy, recoiling against reconstructed hadronic B decay

Sensitivity depends on detector hermeticity BABAR coverage in backward direction is compromised by DIRC PID This can be substantially improved in SuperB by covering backward

solid angle with even a crude calorimeter Progress report:

Signal

Two background modes thus far:

E


B S/B with backward endcap A. Rakitin

S/B is significantly improved for both backgrounds


Ren-yuan Zhu, with ADR funds, has been for several years, workingon the development of LYSO crystals for HEPVery attractive for the SuperB endcap EMC and the CMS SLHC upgrade


A beam test of the forward EMC endcap configuration in tagged photon and e- beams is planned for LNF in November

A 5x5 projective LYSO array will be usedwith a CsI(Tl) surround to catchthe outer few percent of shower

CMS APD readout module2 @ 5mm x 5mm APD will be used(10x10mm APDs are now available)

Photodiodes are also underconsideration

We have borrowed 16 spare CLEO-II CsI(Tl) crystals for the outer section


Is there a fourth quark generation ? A fourth generation CKM-like mixing matrix has

2 additional quark masses 3 additional mixing angles 2 additional CP-violating phases

A recent analysis by Bobrowski, Lenz, Reidl and Rohrwild shows that largeregions of the new parameter spacesare still allowed

SuperB will be the primary tool to close down, or, perhaps find, non-zerovalues of these fourth generation parameters


LFV in decays: SuperB capability

SuperB sensitivity directly confronts many New Physics models BABAR

SuperBsensitivityFor 75 ab-1

We expect to see LFV events, not just improve limits


t -¬

t -¬

t -¬ t -

¬

Flipping the helicity of the polarizedelectron beam allows us todetermine the chiral structureof dimension 6 four fermionlepton flavor-violating interactions

t -¬ t -

¬

Polarized ’s can probe the chiral structure of LFV

Dassinger, Feldmann, Mannel, and TurczykJHEP 0710:039,2007;

[See also Matsuzaki and SandaarXiv:0711.0792 [hep-ph]

t -¬t-¬

t -¬

¨-

¨-

¨-

¨-

¨-


Why do we need a very large sample ~75ab-1 ?

Im (

13) L

L

Im (

13) L

L

Re (13)LL Re (13)LL

SM SM

Example: CPV in loop B decays

Determination of coupling [in this case : (13)LL] with 10 ab-1 and 75 ab-1


High statistics flavor physics (50-75 ab-1) with SuperB will provide discovery potential and information vital to interpret New Physics found at LHC The achievable levels of sensitivity in rare b, c and decays allow

substantial coverage in the parameter space of new physics

SuperB presents a strong physics opportunity for the US community US participation in SuperB will leverage $270M of PEP-II and BABAR

components through an in-kind contribution New funding of $10-20M/year over the TDR and construction period will

also be needed to allow US participation in design and construction of the collider and detector upgrade

Such participation in encouraged by P5 in Scenario B and above We are working towards a turn-on date of 2015/16

The Caltech group can, as it did in PEP-II and BABAR, play a central role in SuperB and the construction of a US contingent of the Collaboration

We are transitioning from the current intense analysis phase of BABAR into the TDR phase of SuperB

Conclusions



SuperB+Lattice improvements

Interplay between metrology and New Physics sensitivity

Today

= ± 0.0028 = ± 0.0024

= 0.163 ± 0.028 = 0.344± 0.016

Improving the precision of Unitarity Triangle measurements, along with reducing theoretical uncertainties, can provide evidence

for New Physics


CMSSM : e vanishes at all SPS points MVF-NP extensions : e vanishes as s130is independent of s13

1 1 7510ab : 75ab for ( ), 7.5 for ( )

10 B B

LFV

2

5 disc

B B


107 B

(

M 1

/2

SuperB

SO(10) MSSMLFV from PMNS

LFV from CKMBeyond MFV

SUSY GUTnow

SuperB

Recent work :J.K.Parry, H.-H. Zhanghep-ph/0710.5443

Allowed by ms

From Bs phase

now

SuperB


t -¬

t -¬

t -¬ t -

¬

Flipping the helicity of the polarizedelectron beam allows us todetermine the chiral structureof dimension 6 four fermionlepton flavor-violating interactions

t -¬ t -

¬

Polarized ’s can probe the chiral structure of LFV

Dassinger, Feldmann, Mannel, and TurczykJHEP 0710:039,2007;

[See also Matsuzaki and SandaarXiv:0711.0792 [hep-ph]

t -¬t-¬

t -¬ -

¬ -

¬

-¬ -

¬

-¬


SPS4 is ruled out by exp value of B(Bs)

SPS1a is the least favorable for flavor effects, but SuperB and only SuperBcan observe 2 deviations in several observables

Minimal Flavor Violation : SNOWMASS points


Many channels can show effects in the range S~(0.01-0.04)

New Physics in CPV: sin2 from “s Penguins”…

SuperB

(*) theory limited

d d

sb

W-

B0d

t ss

K0

g

sb b s

~

~ ~

23d

LR

X


1 10

1

10-1

10-2 (TeV)gluinom

is measured with a significance >3 away

from zero

23| |LR

23| |LR

Arg(23)LR=(44.5± 2.6)o

= (0.026 ± 0.005)

1 10

g

sb b s

~

~ ~

New Physics contribution (2-3 transitions)

23d

LR

MSSM + generic soft SUSY breaking terms

Flavor-changing NP effects in the squark propagator NP scale SUSY mass

flavor-violating coupling X

0.01

0.1

2

, ,

2, ,

( )qij LR RR LLq

ij LR RR LL

M

m

~ gm m


KB

Exhibit B: SM Branching fractions: Current 10ab-1 75ab-1 * , ( )SB K K K

Actual limit


CP Violation in charmNOW

SuperB


polarized e- beam: reduced background

Very important order of magnitude 10-8 10-9

Complimentarity with e

A Super Flavor Factory is also a factory Lepton Flavor Violation

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