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Shin-ichi Kurokawa KEK ACAT03 Tsukuba, Japan December 1, 2003

Overview of KEK Activities. Shin-ichi Kurokawa KEK ACAT03 Tsukuba, Japan December 1, 2003. Accelerators in KEK. TRISTAN. KEKB. K2K. AR. 12-GeV PS. Photon Factory. Counter Experimental Hall. Booster Facility. e - e + Linac. Contents. KEKB (B-Factory) BELLE K2K at 12-GeV PS

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Shin-ichi Kurokawa KEK ACAT03 Tsukuba, Japan December 1, 2003

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  1. Overview of KEK Activities Shin-ichi Kurokawa KEK ACAT03 Tsukuba, Japan December 1, 2003

  2. Accelerators in KEK TRISTAN KEKB K2K AR 12-GeV PS Photon Factory Counter Experimental Hall Booster Facility e-e+ Linac

  3. Contents • KEKB (B-Factory) • BELLE • K2K at 12-GeV PS • J-PARC • GLC

  4. KEKB/Belle 3.5 GeV(e+) x 8 GeV(e-) 3016 m circumference Finite angle crossing of 22 mrad Luminosity 1034cm-2s-1 Asymmetric-energy 2-ring, e- e+ collider B-Factory

  5. L : luminosity (cm-2s-1) x : beam-beam tuneshift r =sy/sx (at IP) r=1 round beam r=0 flat beam I : beam current (A) E : beam energy (GeV) by*: b-value at IP (cm) + : positron - : electron

  6. Basic Design Parameters

  7. SC Cavities in KEKB * RF of HER is a combination of SC & NC. * Crab cavities is just under R&D phase. SC cavities in NIKKO straight section.

  8. Peak Luminoity of KEKB & PEPII Achieved 1034 Surpassed PEPII

  9. Integrated Luminosity of KEKB & PEPII KEKB PEPII

  10. Integrated Luminosity of KEKB and PEP-II from this fall

  11. Luminosity records of KEKB : integrated luminosity recorded by Belle Detector

  12. Best Shift

  13. 1861mA 1106mA

  14. More Current 4increase RF ILER = 9.4 A 4replace vac. Chamb. 4increase RF 4modify IR 4 Crab Xing 2002 03 04 05 06 07 08 09 10 11 KEKB Upgrade Plan L~1036 L=2x1035 L=2x1034 L=1034 ∫Ldt = 350fb-1 ILER = 1.5A

  15. Design parameters of KEKB and SuperKEKB

  16. BELLE Results

  17. Belle Detector

  18. BELLE

  19. New measurement of sin2f1 (Belle 2003) 5417 evts 140 fb-1 sin2f1=0.733±0.057±0.028 Poor tags Raw asymmetry |lccs| =1.007±0.041(stat) i.e., consistent with no direct CPV. Good tags BELLE-CONF-0353

  20. Current Belle and BaBar Results for sin(2φ1) sin2f1 (Belle 2003,140 fb-1) =0.733±0.057±0.028 sin2f1 (BaBar 2002, 81 fb-1)=0.741±0.067±0.033 sin2f1 (New 2003 World Av.) =0.736±0.049 Thanks to A. Hoecker

  21. Belle 2003: CP Asymmetry in Bφ KS 140 fb-1 Belle (A=-0.15±0.29±0.07) +0.09 Belle: sin2φ1eff = -0.96 ±0.50 -0.11 3.5σ off Current WA: sin(2φ1)=0.731±0.056

  22. Belle vs BaBar • Belle: sin2φ1eff (BφKS) = -0.96±0.50 • BaBar: sin2φ1eff (BφKS) = +0.45±0.43±0.07 • There is a 2.1 σ discrepancy between the exps. • Average =-0.15±0.33 (Still 2.7σ from the SM) +0.09 - 0.11 Need x 5-10 integrated luminosity to reach definite conclusion

  23. Discovery of X(3872) – four quarks meson ?

  24. Super-Kamiokande and K2K

  25. Super-Kamiokande/K2K SK: Partially Recovered !! # of PMTs in SK-II: ~5200 PMTs ~47% of SK-I ( 11146) cosmic ray muon in SK-II K2K Neutrino Event in SK-II

  26. Normalized by area No oscillation SK Atm. K2K With oscillation K2K long baseline experiment SK 250 km KEK PS 5.6 x 1019 POT g8.1 x 1019 POTg1020 POT Observation: 56 events/Expectation 80.1 + 6.2 – 5.4 NEW!! Ｋ２Ｋ-Ⅱ16events/Expectation26.6+2.3-2.6

  27. Super-Kamiokande schedule 2003 2004 2005 2006 2007 SK-Ⅱ K2K-Ⅱ Break for full reconstruction PMT Production (PMT #: 5200  11146) SK-Ⅲ Hyper Kamiokande : Official schedule for construction is not known.

  28. J-PARC

  29. J-PARC Japan Proton Accelerator Research Complex to be built in Tokai, 60 km N-E of KEK Nuclear and Particle Experimental Facility Materials and Life Science Experimental Facility Nuclear Transmutation Neutrino to Kamiokande 3 GeV Synchrotron (25 Hz, 1MW) 50 GeV Synchrotron (0.75 MW) Linac (350m)

  30. Configuration of the Accelerator Complex

  31. World’s Proton Accelerators

  32. Research Program at J-PARC There are a variety of studies proposed by using various beams : Pion, Kaon, and Proton, Muon, Neutron, and Neutrino.

  33. World Centers For Kaons, p’s, etc.: This facility + GSI’ new facility. For neutrinos and for neutrons: One of three big centers. For transmutation: A unique facility.

  34. Super-K: 50 kton Water Cherenkov 0.75 MW 50 GeV PS LBL experiment “Tokai-Kamioka neutrino project” Narrow bandnm beam ~ 1GeV Mega-ton “H- Kamiokande” 4MW 50GeV PS 1st Phase (x102 of K2K) 2nd Phase • nm→ nx disappearance • nm→ neappearance • NC measurement • Proton Decay • CP Violation

  35. Neutrino Line J-PARC schedule (Phase I) 2003 2004 2005 2006 2007 2008 200 (400) MeV LINAC Commiss’g & Operation 3 GeV Ring 50 GeV Ring Fixed Target Exp. Hall [ Schedule for Phase II is yet to be worked out. ]

  36. Summary • KEKB has achieved its design luminosity goal. • BELLE is producing good physics and has found some hint of new physics. • K2K restarted after having fixed problems of the SuperK accident. • Photon Factory and PF-AR are running well with many users. • J-PARC is on the track.

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