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Super B factory @ KEK - Super KEKB -

Super B factory @ KEK - Super KEKB -. B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration. Physics motivation Accelerator and Detector Project schedule. June 16-21, SUSY08 @ Seoul, Korea. Belle highlights. belle.kek.jp. CPV discovery. Many new resonances.

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Super B factory @ KEK - Super KEKB -

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  1. Super B factory @ KEK- Super KEKB - B.G. Cheon (Hanyang Univ., Seoul) For the Belle collaboration • Physics motivation • Accelerator and Detector • Project schedule June 16-21, SUSY08 @ Seoul, Korea

  2. Belle highlights belle.kek.jp CPV discovery Many new resonances Evidence forBgtn X(3872) Z(4430) D0-D0 mixing bgdg transition BgD*tn AFB in BgK*l+l- Belle, 2005 SM And more …

  3. Why KEK Super B factory ? • Many questions still remain in the SM. • Something beyond SM should be there. • Need more data to answer the questions. • KEKB/Belle achievement ~ 0.85 ab-1 • Initial target ~ 10 ab-1 (limited funding) • Final target ~ 50 ab-1

  4. Physics at KEK Super B factory New source of CP violation New source of flavor mixing Precision test of KM scheme LFV t decays SUSY breaking mechanism Charm physics New resonances, D0D0 mixing… Super-high statistics measurements: aS, sin2qW, etc.

  5. BSM sensitive measurements * Decay modes including g / p0 / n can be accessed only with e+e- machines. Flavor physics review talks are waiting for us on Wed. !!!

  6. Vts: no KM phase f1 * Vtd , h’, K+K- , h’, K+K- + B B * Vtd f1 _ One example to find BSM Phases SM: sin2f1 =sin2f1 from BJ/y K0(bc c s) unless there are other, non-SM particles in the loop eff

  7. New physics in loops? Many new phases are possible in SUSY BSM effect may enter inbs Method: CompareS(fK0) withS(J/yK0) SM prediction: DS S(fK0)-S(J/yK0)  0 O(1) effect allowed even if SUSY scale is above 2TeV.

  8. Hints of NP in bspenguins ? Smaller than bccs in 7 of 9 modes Theory predicts positive shifts Naïve average of all b g s modes sin2f1eff = 0.56 ± 0.05 2.2 s deviation from SM (CL=3%)

  9. KEKB + PEP-II ~ 1.4 Billion BB pairs ~840/fb (Jun/10/08) ~1370/fb ! KEKB for Belle ~531/fb (Apr/7/08) design luminosity PEP-II for BaBar Integrated Luminosity May be time to switch units to ab-1 Lpeak (KEKB) = 1.7 x 1034/cm2/sec (design 1.0)

  10. 8 GeV e- SCC RF(HER) New IR with crab crossing and smaller by* Crab cavity 8GeV e- ARES (LER) 3.5GeV e+ Ares RF cavity 3.5 GeV e+ More RF for higher beam current New beam-pipe with ante-chamber e+ source Damping ring for e+ beam SR KEKB upgrade - Super B factory @ KEK - • Upgrading the existing KEKB collider • 3 years shutdown from 2009 • Initial target ~ 2 x 1035/cm2s = 10 x KEKB Luminosity • Final goal ~ 8 x 1035/cm2s , Integrated Lum.= 50 ab-1 • Many components are now being tested.

  11. K. Oide

  12. Expected Beam Background Rad-Bhabha mask around QCS magnet IR chamber design Results based on GEANT SIM validated by Belle/KEKB experience. 1st layer Conservative, robust detector should be handled up to 20 times more background

  13. Features of Super Belle detector • In contrast to LHCb, superb neutral detection capabilities. • e.g. BKSp0g can be used to detect right-handed currents. • Capable of observing rare “missing energy modes” • e.g. BKnn with B tags. Issues: • Higher background ( 20) • Higher event rate ( 50) • Required special features • radiation damage and occupancy • fake hits and pile-up noise in the EM - higher rate trigger, DAQ and computing • low pm identification  smm recon. eff. • hermeticity n “reconstruction”

  14. Super Belle detector Faster calorimeter with waveform sampling and pure CsI crystals New particle identifier with precise Cherenkov device: TOP or fDIRC. KL/m detection with scintillator and next generation photon sensors Background tolerant super small cell tracking detector New dead time free pipelined readout and high speed computing systems Si vertex detector with high background tolerance (striplets or pixels) Possible solution: 4Replace inner layers of the vertex detector with a silicon striplet or pixel detector 4Replace inner part of the central tracker with a silicon strip detector. 4Better particle identification device (TOP) focussing DIRC (fDIRC) 4Replace endcap calorimeter by pure CsI. 4Faster readout electronics and computing • Korean group contribution : • Calorimeter trigger system construction • CDC Tracker z-trigger system implement • SVD silicon strip sensor R&D

  15. KEK Web page (5 Year Plan) +20 page report

  16. experiment upgrade experiment + upgrade experiment + upgrade construction experiment + upgrade Detector R&D KEK Roadmap 2006 2008 2010 2012 2014 2016 2018 • J-PARC construction experiment + upgrade Very Preliminary • KEKB upgrade • LHC • PF/PF-AR • R&D for Advanced Accelerator and Detector Technology ERL construction test experiment C-ERL R&D PF-ERL R&D construction experiment ILC ILC R&D construction

  17. Tight Schedule for the Super KEKB Collaboration 2007 2008 2009 2010 2011 2012 10 1 4 7 10 1 4 7 10 1 4 7 10 1 4 7 10 1 4 Experiment at KEKB KEKB/Belle upgrade ** TDR Detector Study Report (March 08) Final detector design (April 09) 2007 2008 2009 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 Detector proposals Internal review (inc. PID shootout) BNM (January 08) Pre kick-off meeting (March 08) 2nd open meeting (July 08) Meeting plan Actions to invite new collaborators One-day general meeting and an IB meeting at every BGM ** Possible 6-month shift to the right

  18. Conclusions KEKB is moving ahead with a machine and detector designed to discover new sources of flavor mixing and CPV. The accelerator and detector have a track record of exceeding expectations. Super KEKB and LHCb are complementary. Super KEKB is a special opportunity for high impact international collaboration.

  19. Backup slides

  20. Major Achievements Expected at SuperKEKB: An Image New CP-Violating Phase in bgs with 1 degree precision CKM Angle Measurements with 1 degree precision Discovery of BgKnn Precise meas. of D mixing Discovery of New Subatmic Particles Discovery of new CPV phase in B gfK (for present WA) sin2qW with O(10-4) precision Discovery of Bgmn Observations with U(5S), U(3S) etc. Discovery of BgDtn Discovery of CP Violation in Charged B Decays “Discovery” with sigfinicance > 5s Discovery of Direct CP Violation in B0gKp Decays (2005) Discovery of CP Violation in Neutral B Meson System (2001)

  21. Search for new right-handed currents through CP violation • SM Electroweak: purely left-handed • New right-handed current R g _ B0 almost purely left-handed photon described with an amplitude for a left-handed photon: L Ks p0 Interference b/w Land R Large CP violation Atwood-Gronau-Soni 1997 Atwood-Gershon-Hazumi-Soni 2005

  22. Identification of SUSY breaking scenario Pattern of deviations from the Standard Model Y.Okada Observ- ables SUSY models ++: Large, +: sizable, -: small

  23. Principle of a TOP counter Provides ~4σ/K separation at 3.5 GeV/c (Measure 1D position and time in a compact detector) Simulation 2GeV/c, q=90 deg. ~2m Linear array PMT (~5mm) Time resolution s~40ps ~200ps K p Different propagation lengths propagation times

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