Super B Physics Opportunities David Hitlin SLUO Annual Meeting September 17, 2009

Why SuperB ? The motivation to continue e+e- flavor physics studies with a Super B factory beyond the BABAR/Belle/(LHCb) era lies in its ability to make measurements that have sensitivity to physics beyond the Standard Model This sensitivity extends to New Physics in b, c and t decay A data sample of 50-75 ab-1 is required to provide this sensitivity BABAR +Belle total sample is <2 ab-1 A luminosity in the range of 1036 cm-2s-1 is required to integrate this large a sample in a reasonable time There are two approaches on the market to acquiring such a sample SuperKEKB at KEK and SuperB at Rome II Univ (Tor Vergata) or LNF Both asymmetric colliders now use a version of the “Italian scheme” Collide asymmetric energy rings having very low emittance, similar to those developed for the ILC damping rings and high brightness light sources SuperB also employs a new type of final focus – a “crabbed waist” and has a longitudinally polarized (~80%) LER beam Beam currents and wallplug power are reduced from brute force extrapolations of the existing machines PEP-II and KEKB Luminosity-related backgrounds and radiation levels in the forward/backward directions are high: under intensive study Design of an appropriate detector is a tractable problem

Roman Villa Collider Hall SuperB LINAC SPARX SuperB at the Tor Vergata site with circumference 1.8 km

The SuperB detector is an upgrade of BABAR New SVT with striplet-> pixel Layer 0 New DCH Smaller DIRC SOB Possible forward PID New EMC forward endcap Possible rear endcap calorimeter Improved muon ID BABAR SuperB

Who ? The SuperB accelerator and detector effort has produced a CDR, and is now in the middle of a two year TDR phase Effort from Italy, US, France, Russia, Canada, UK, Spain, Norway European roadmap recognizes the SuperB project Progress reported to the CERN Strategy Group P5 report includes SuperB at Scenario B Approval process is proceeding apace in Italy Anticipate a decision by the end of the year Site selection soon thereafter Form the detector/physics collaboration within months of decision Five year construction period Many PEP-II and BABAR components can be re-used

Two nascent efforts Both now employ versions of the “Italian scheme”: >80ab-1 after 6 years Both now employ versions of the “Italian scheme”: Low emittance rings with large crossing angles 50ab-1 by ~2020 L~8x1035 10ab-1 ~ 2016 L~2x1035 3year shutdown for upgrade 2015? 2020?

What’s the killer app? Is it the ability to discover lepton flavor-violating t decays and determine the chirality of the LFV coupling ? Neutrino oscillations demonstrate the existence of neutral LFV couplings Charged LFV are very small in the Standard Model, but measureable at a Super B factory Is it the unique sensitivity to new CP phases beyond the CKM phase in B and D decay through studies of direct and indirect CP asymmetries? Is it the sensitivity to the existence of a fourth quark generation ? Is it the sensitivity to right-handed currents ? Is it the sensitive tests of CPT invariance at the highest available q2 made possible by exploiting quantum coherence ? Is it the whole panoply of measurements and the pattern of effects uncovered that can serve as a “DNA chip” for New Physics found at LHC ?

Many SM extensions yield measurable effects in flavor physics Little Higgs w/ MFV UV fix Generic Little Higgs Extra dim w/ SM on brane Generic extra dim w SM in bulk SUSY GUTs Supersoft SUSY breaking Dirac gauginos MSSM MFV low tan MSSM MFV large tan Effective SUSY SM-like flavor physics Observable effects of New Physics after G. Hiller

Lepton Flavor Violation in t decays Super B Factory sensitivity directly confronts New Physics models SuperB sensitivity For 75 ab-1 We expect to see LFV events, not just improve limits

Lepton Flavor Violation in t decays Impact of q13 in a SUSY seesaw model Antusch, Arganda, Herrero, Teixeira, JHEP 0611:090,2006

LFV B 5s disc 2 MVF-NP extensions : meg vanishes as s130 tmg is independent of s13 CMSSM : meg vanishes at all SPS points

Lepton sector constraints in an SU(3)-flavored MSSM Lightest slepton mass Calibbi, Jones Perez, Masiero, Park, Porod & Vives arXiv 0907.4069v2

Beyond MFV now SO(10) MSSM Super B Factory SUSY GUT now LFV from CKM LFV from PMNS 107 B (tmg) now SO(10) MSSM SuperB Super B Factory M1/2 SUSY GUT now Super B Factory Allowed by Dms From Bs phase J.K.Parry, H.-H. Zhang hep-ph/0710.5443

LFV branching fraction ratios are discriminators Blanke, Buras, Duling, Recksiegel & Tarantino, arXiv:0906.545v1

Polarized t’s can probe the chiral structure of LFV in a model-independent manner A longitudinally polarized electron beam, producing polarized t’s, can determinate the chiral structure of lepton flavor-violating interactions Dassinger, Feldmann, Mannel, and Turczyk JHEP 0710:039,2007; [See also Matsuzaki and Sanda Phys.Rev.D77:073003,2008 ]

mixing is now well-established and large D0 K  decay time analysis BABAR: PRL 98 211802 (2007) 3.9 D0 K K   vs K  lifetime difference analysis Belle: PRL 98 211803 (2007) 3.2 D0 Ks   time dependent amplitude analysis Belle: PRL 99 131803 (2007) 2.2 D0 K   decay time analysis CDF: PRL 100, 121802 (2008) 3.8 D0 K K   vs K   lifetime difference analysis BABAR: PRD 78, 011105 R (2008) 3.0 D0 K   0 time dependent amplitude analysis BABAR: arXiv:0807, 4544 (2008) 3.1 D0 K   relative strong phase using quantum-correlated measurements in e+e- CLEO-c: PRD 78, 012001, (2008) D0 K-+ and K+K- lifetime ratios BABAR: EPS 2009 4.1 Significance of all mixing results (HFAG Preliminary– EPS2009): 10.2s This raises the exciting possibility of searching for CP violation Super B Factory @ 75 ab-1 + +

CP violation in DC=2 mixing in an LHT model |q/p| from D→Kp, Kpp.. 75 ab-1 LHT model Little Higgs w T parity Bigi, Blanke, Buras & Recksiegel arXiv:0904.1545v3 [hep-ph]

CKM Fitter results as of Moriond 2009 The BABAR and Belle CP asymmetry measurements together with improved precision in other measurements have produced a set of highly overconstrained tests, which grosso modo, are well-satisfied A closer look, however, reveals some issues

A variety of analyses have pinpointed tensions in the UT These are all at the 2-3 s level, but occur in several places e.g., Lunghi and Soni analysis

Does the agreement of the overconstrained tests stand up to detailed scrutiny ? There is actually some tension, and there are enough constraints to explore these issues Caveats: There may be Standard Model explanations for some effects All issues are at the <3s level Inclusive and exclusive Vub determinations are not in good agreement There are also issues with inclusive/exclusive Vcb The B(B→tn) conflict The agreement of the fitted, i.e., SM-predicted value of sin 2b vs the directly measured value using tree decays and loop decays is not perfect The Bs → ψϕ phase The Kp problem

The B(B→tn) conflict Effectively a measurement of fB Determines same constraint B(B→tn) also constrains Higgs doublet models G. Eigen

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 large regions of the new parameter spaces are still allowed SuperB factories will be the primary tool to close this window, or, perhaps, to find significantly non-zero values of these fourth generation parameters q14 q24 d14 d13

New physics in Bd, Bs mixing ?? There is still room for sizeable contributions from New Physics Model-independent parametrization for New Physics in ΔF=2 transitions The preferred (SM+NP) ΔNP value is currently ~ 2σ from SM for both Bd and Bs systems To clarify: Updated Tevatron result LHCb sin2bs measurement

CPV Probes of New Physics In the Standard Model we expect the same value for “sin2 ” in modes, but different SUSY models can produce different asymmetries Since the penguin modes have branching fractions one or two orders of magnitude less than tree modes, a great deal of luminosity is required to make these measurements to meaningful precision ~ b u,c,t s b d,s,b s W - H - - g, 0 ~

Squark mass matrix (d sector) Super B Factories LHC

SUSY mass spectra for the 9 Snowmass points & slopes SPS-9 SPS-8 SPS-7 SPS-6 SPS-5 SPS-4 SPS-3 SPS-2 SPS-1 1500 1000 500 250 Ghodbane and Martyn

New Physics in CPV: sin2b from s Penguins… Many channels can show effects in the range DS~(0.01-0.04) b s f t s SuperB 75 ab-1 B0d s d d K0 ~ g b ~ ~ s b s X (*) theory limited

Precision of “sin2b” measurement in B g fK0 J/yK0 fK0

Kinematic distributions in 0.5 1 FL AFB SM C7= – C7SM

Much more data is required for a definitive result Can be pursued with exclusive or inclusive reconstruction A measure of the relative merits is the precision in determination of the zero Exclusive Inclusive Theory error: 9% + O(L/mb) uncertainty Egede, Hurth, Matias, Ramon, Reece arxiv:0807.2589 Experimental error (SHLC): 2.1% Theory error: ~5% Huber, Hurth, Lunghi arxiv:0712.3009 Experimental error (Super B Factory): 4-6%

The pattern of deviation from the SM values is diagnostic Model Bd Unitarity Time-dep. CPV Rare B decay Other signals mSUGRA (moderate tan) - mSUGRA (large tan ) Bd mixing B → (D)* b → sl+l− Bs →  Bs mixing SUSY GUT with R B → KS B → K∗  LFV, n EDM Effective SUSY ACP (b→s) b → sl +l − KK graviton exchange Split fermions in large extra dimensions mixing Bulk fermions in warped extra dimensions Universal extra dimensions b → s K →

A Super B Factory is a DNA chip for New Physics

Conclusions A new generation of flavor physics experiments will play a vital role in understanding new physics found at LHC A full set of constraints requires studies of EDMs, (g-2)m, rare m and t decays, me conversion and rare K, D and B decays High statistics (50-75 ab-1 ) data samples at e+e- Super B Factories provide both Discovery potential charged lepton flavor violation CPV in mixing, and A DNA chip to discriminate between model of New Physics The achievable levels of sensitivity in rare b, c and  decays provide substantial coverage in the parameter space The SuperB program, of course, overlaps with the programs of LHC flavor experiments such as LHCb, but the e+e- environment makes possible a substantial number of unique and important physics measurements in areas sensitive to New Physics

B Physics: (4S) Charm mixing and CPV Charm FCNC Bs Physics: (5S)  Physics