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LBL Oscillation Physics @WIN05

LBL Oscillation Physics @WIN05. H. Minakata (Tokyo Metropolitan U.). n oscillatory behavior has been seen!. SK. K2K. KamLAND. What is left #1: q 13 (There are 2 ways). LBL vs. reactor. What is left #2:  mass hierarchy. What is left #3: CP violation. Shoichi Sakata. Ziro Maki.

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LBL Oscillation Physics @WIN05

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  1. LBL Oscillation Physics@WIN05 H. Minakata (Tokyo Metropolitan U.)

  2. n oscillatory behavior has been seen! SK K2K KamLAND Hisakazu Minakata

  3. What is left #1: q13 (There are 2 ways) LBL vs. reactor Hisakazu Minakata

  4. What is left #2:  mass hierarchy Hisakazu Minakata

  5. What is left #3: CP violation Shoichi Sakata Ziro Maki Lepton-quark correspondence ? • Relation to cosmic baryon number? Hisakazu Minakata

  6. Closest possibility: J-PARC phase II T2K phase-I: The unique LBL experiment funded ! • JPARC accelerator upgraded to 4MW • Hyper-Kamiokande of 1 Mton (fiducial volume = 0.54 Mton) Hisakazu Minakata

  7. There are competitive ideas/plans, e.g., NOA High-gamma beta beam Hisakazu Minakata

  8. For me it is natural to think about J-PARC phase II project for many reasons, but it has a serious problem… Hisakazu Minakata

  9. A half of the sensitivity region is obscured O. Yasuda, @NOON04 Hisakazu Minakata

  10. Why so much ambiguity by sign(Dm2) degeneracy? The reason is: • Large d2 - d1 (= p/2 ~ p) in overlapping region of different-sign Dm2 ==> CPC-CPV confusion One has to solve sign-degeneracy to determine  Hisakazu Minakata

  11. T2KK, or Resolving neutrino mass hierarchy and CP degeneracy by Komioka-Koreatwin Hyper-Kamiokande Based on: M. Ishitsuka, T. Kajita, HM, H. Nunokawa, hep-ph/0504026

  12. There are cultural,philosophical, diplomatic,string-theoretical reasons for T2KK apart from scientific ones Hisakazu Minakata

  13. Korea is booming in Japan ! 韓流ブーム Hisakazu Minakata

  14. Korea is booming in Japan continued Hisakazu Minakata

  15. Current design of Hyper-Kamiokande contains 2 tanks ! Why don’t you bring one of the 2 tanks to Korea? Hisakazu Minakata

  16. Yes, we are the neighbours Taken from Hagiwara et al. Hisakazu Minakata

  17. Sign confusion in Korea is as severe as in Kamioka Hisakazu Minakata

  18. Where is the right place? How different are P’s of 2 degenerate solutions @Kamioka Hisakazu Minakata

  19. What is the difference: 1st-1st OM Hisakazu Minakata

  20. Energy dependence far more dynamic at 2nd OM ! What is the difference: 1st-2nd OM Hisakazu Minakata

  21. high-E(1st-1st OM) vs. low-E(1st-2nd OM) Hisakazu Minakata

  22. Spectral information solves degeneracy Hisakazu Minakata

  23. T2K(0.54 Mt) vs. T2KK(0.27+0.27 Mt)  Hisakazu Minakata

  24. T2K(0.54 Mt) vs. T2KK(0.27+0.27 Mt)  Hisakazu Minakata

  25. T2KK can resolve  mass hierarchy keeping CP sensitivity hierarchy CP thick: 3 thin: 2 Hisakazu Minakata

  26. Power of 2 identical detectors Systematic errors cancel between 2 HK ! • Modest requirement of 5% systematic errors is enough to guarantee the great sensitivity to CP violation and  mass hierarchy ! Hisakazu Minakata

  27. Results insensitive to systematic error ! Hisakazu Minakata

  28. T2KK vs. NOA; mass hierarchy thick: 3 thin: 2 T2K II Hisakazu Minakata

  29. T2KK vs. NOA; CP thick: 3 thin: 2 Hisakazu Minakata

  30. T2KK vs. super-NOA; mass hierarchy 95% CL dashed/ solid w/o proton D thick: 3 thin: 2 Mena-Palomares-Ruiz-Pascoli; L2nd=200 km Hisakazu Minakata

  31. Conclusion • People started to explore various 2 detector setups for determining CP & mass hierarchy in the context of conventional  superbeam • There are two options; 1st-1st OM and 1st-2nd OM. They differ in  spectral properties => require different strategy • T2KK improves the original T2K II proposal with no extra cost by adding ability to determine mass hierarchy while keeping sensitivity to CP violation Hisakazu Minakata

  32. Supplementary sheets Hisakazu Minakata

  33. 2 and background • 5% errors are assumed Hisakazu Minakata

  34. Events vs. selectionsDm2=2.5x10-3eV2,sin22q13=0.1 Mine@NP04 workshop (events / 22.5kt / 5yrs) (stat.) (stat.) (stat.) (old p0 fitter: 12 15 109) Hisakazu Minakata

  35. Stability of the results Hisakazu Minakata

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