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Warm-up Introduction of Belle CKM Analyses

Warm-up Introduction of Belle CKM Analyses. Toru Iijima (Belle) / Nagoya (iijima@hepl.phys.nagoya-u.ac.jp). 2 nd Informal Vub Mini-Workshop @ Nagoya, May 30-31, 2002. A. f cp. B. e -2i f 1. A. B. Recent update of CP in B 0 Decays. Moriond ’02 Belle sin2 f 1 at 41.8 fb -1

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Warm-up Introduction of Belle CKM Analyses

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  1. Warm-upIntroduction of Belle CKM Analyses Toru Iijima (Belle) / Nagoya (iijima@hepl.phys.nagoya-u.ac.jp) 2nd Informal Vub Mini-Workshop @ Nagoya, May 30-31, 2002

  2. A fcp B e-2if1 A B Recent update of CP in B0 Decays Moriond ’02 Belle sin2f1 at 41.8 fb-1 = 0.82±0.12(stat.)±0.05(syst. ) w/ 1550 events LP01 More than 6s deviation from 0 ! 0.99±0.14±0.06 @ 29.1fb-1 (LP01) w/1137 events “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  3. 0.69 0.15 0.16 CP-1 CP+1 1.14 0.22 0.24 Belle sin2f1 w/ 41.8 fb-1 Statistical error only “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  4. Present sin2f1 status “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  5. Recent Vub Updates • CLEO: end-point analysis + b→sg shape function (hep-ex/0202019) • BaBar/Belle exclusive • BaBar (rln) • Belle (rln) CLEO(rln) stat 1/mb fu HQE LEP HF Working Group: exp bc bu b HQE Moriond’02 stat sys mod Preliminary DPF w/ ISGW2 “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  6. 0.1 1 0 –0.1 –0.2 –0.3 –0.4 –0.5 Revival of Inclusive Measurements • Measurements of parameters in theory calculation ⇒Better determination of Vcb, Vub w/ inclusive decays. bc inclusive: Mx moment Vcb b→sg: Eg moment Vub “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  7. Evidence of Ds p ? • BaBar @ Moriond ‘02 14.9  4.1 events D- r+ D- p+ Evidence of reflected Ds+D+ background significance of the signal = 3.5 s • Systematic error mostly from uncertainty on BF of secondary decays, peaking background uncertainty, selection criteria Preliminary BF( B0 Ds+p-)(*) = ( 3.1  1.0  1.0 )  10-5 BF( B0 Ds+p-)  BF(Ds+ fp+ ) = ( 1.11  0.37  0.24 )  10-6 (*)25% uncertaintyfrom PDG BF(Ds+  fp+) How about Belle’s status  Talk tomorrow… “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  8. Present CKM Constraint Standard Constraints (not including sin2) A.Hocker @FPCP |Vcb*Vcd|~0.0092 “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  9. Luminosity at KEKB… Lpeak = 7.249 ×1033cm-2s-1 Lday = 387 pb-1 Lint = 80.7fb-1 6.617 339.2 57.2 at the time of 1st WS. （PEP-II/BaBar:88.36fb-1) “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  10. Belle CKM Analysis • CKM analysis group conveners: Y.Kwon, T.Iijima • Vcb related subjects • D+ l n (J.W.Nam, SKKU) • D* l n (H.K.Jang, SNU) • Lepton inclusive (K.Yoshida, Nagoya) • Vub related subjects • Inclusive semileptonic decays • End-point analysis (A.Limosani, Melborune) • Mx (q2) measurement with Full recon tag. (Slovenia ++ others) Neutrino recon tag. (H.Kakuno, TIT) D(*) l n tag. (A.Sugiyama, Nagoya) • Exclusive semileptonic decays (p l n, r l n) • Heejong Kim (Yonsei), J.W.Nam(SKKU), C.Schwanda(KEK), M.Gobinda(Tata), … • Hadronic decays Ds p (D.W.Kim, SKKU) Ds Xu w/ pseudo recon. (C.Everton, Melborune) Ds inclusive (Y.Mikami, Tohoku) • Leptonic decays (B l n) • B e n, m n (H.W.Kim, Korea) • B t n (Liventsev, ITEP) “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  11. Purpose of mini-Workshop • Enhance discussion with theorists. • for experimentalists, learn about theoretical aspects • for theorists, learn about experimental issues Better idea • Make clear the present achievement: • signal-to-noise, efficiency • #events / fb-1 • Experimental errors (statistical and systematics) • Extrapolate to 100fb-1/300fb-1..., and make clear the prospect toward Summer 2002 and beyond.. • Discuss how to extract Vub from the measurement, and how to treat the error. • List up whatever you want to discuss with theorists. • Others “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

  12. Notes • We ask each speaker to provide 1-2 page summary. • All slides will be posted on Web computer files: send it to sugi@hepl.phys.nagoya-u.ac.jp hard copy: give them to a student for scan • This building is locked in the night • Ask a Nagoya staff/student how to enter (4 digit key code) • Terminal: limited number of terminal available. • Ask a Nagoya staff/student • We will have a BBQ party (18:30~) Staff: \2,000 / Student: \1,000 “Warm-up, Introduction to Belle CKM analyses” by T.Iijima, @ 2nd Vub mini-workshop

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