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sin2 f 1 /sin2 b via penguin processes

sin2 f 1 /sin2 b via penguin processes. Beauty 2006 Sep.25-29, Univ. of Oxford Yutaka Ushiroda (KEK). _. _. b. b. c. J/ Y. c. B 0. w. d. d. _. s. _. w. K 0. d. s. f , h ’. t. g. B 0. s. _. s. K 0. d. Introduction. Time-Dependent CP asymmetry in B 0 decays. _.

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sin2 f 1 /sin2 b via penguin processes

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  1. sin2f1/sin2b via penguin processes Beauty 2006 Sep.25-29, Univ. of Oxford Yutaka Ushiroda (KEK)

  2. _ _ b b c J/Y c B0 w d d _ s _ w K0 d s f, h’... t g B0 s _ s K0 d Introduction Time-Dependent CP asymmetry in B0 decays _ Extra CPV phase from New Physics

  3. Long distance effect 2 Tree (Vub) contamination 2 P P’ T T’ mode CP P P’ T T’ Ks 1     4 KsKsKs +1     K+KKs     ~+1 Ks      f0Ks      Ks      4 Ks      SM Contamination Need to know the size to claim NP a Positive Dsin2f1 u-quark penguin ~Vub*Vus

  4. QCDF -0.1 0.1 0.2 0 Dsin2f1/b Theoretical estimates of Dsin2f1/b Short distance effect QCDF: Beneke, PLB 620, 143 (2005) Cheng, Chua, Yang, PRD 73, 014017 (2006) pQCD: Mishima, Sanda, PRD 72, 114005 (2005) SCET: Williamson, Zupan, PRD 74, 014003 (2006) Long distance effect (is small) Cheng, Chua, Soni, PRD 72, 014006 (2005) Lazzaro’s talk at ICHEP06 Three theoretically-clean modes Reviewed in hep-ph/0605301 (talk by Chua in FPCP06)

  5. Status before summer

  6. KS+- : KSgp+p- KS00 : KSgp0p0 Reconstruction modes

  7. KS+- : KSgp+p- KS00 : KSgp0p0 Reconstruction modes

  8. Obtain CP parameters for 2-body and 3-body modes simultaneously hep-ex/0607112 BgK+K-K0 Time-dependent Dalitz Intermediate resonances ( f(1020)K0, f0(980)K0, X0(1550)K0, cc0K0, D+K-, Ds+K-) and NR K+K-KS+- K+K-KS00 K+K-KL 151665 K+K-K0signal

  9. hep-ex/0607112 b measurement (not sin2b) exclude at 4.6s Fit to low K+K- mass region (<1.1GeV) First in f0gK+K- Preliminary fK0: sin2beff = +0.12  0.31(stat)  0.10 (syst) Cf. BaBar 2005

  10. hep-ex/0608039 B0gfK0 fgK+K-, KSgp+p- fgK+K-, KSgp0p0 fgKSKL, KSgp+p- 24618 409 227 30721 fKS signal fgK+K- 11417 fKLsignal B0 momentum New mode B0 mass (bkg subtracted)

  11. hep-ex/0608039 TCPV in B0gfK0 Preliminary “sin2f1” = +0.50  0.21(stat)  0.06(syst) A = +0.07  0.15(stat)  0.05(syst) Dt distribution and asymmetry • Consistent with the SM (~1s lower) • Consistent with Belle 2005 (Belle2005: “sin2f1” = +0.440.270.05) • fKS and fKL combined • background subtracted • good tags • Dt g –Dt for fKL unbinned fit SM

  12. hep-ex/0609006 TCPV in B0gf0KS Preliminary f0gp+p- Raw Asymmetry B0 mass 377  25f0KSsignal p+p- mass good tags “sin2f1” = +0.18 0.23(stat)  0.11(syst) A = -0.15  0.15(stat)  0.07(syst)

  13. hep-ex/0609006 “sin2f1” = +0.68 0.15(stat)  0.03(syst) (CP-even) A = -0.09  0.10(stat)  0.05(syst) +0.21 -0.13 TCPV in B0gK+K-KS Preliminary Raw Asymmetry B0 mass 840  34 K+K-KSsignal good tags mixture of CP even and odd states (2005)

  14. KS+- : KSgp+p- KS00 : KSgp0p0 Reconstruction modes

  15. hep-ex/0608039 B0gh'K0 B0 mass B0 momentum (bkg subtracted) h’ rg Ks(p+p-) 794  36  h(2g)pp Ks(p+p-) 363  21  h(3p)pp Ks(p+p-) 100  11 rg Ks(p0p0) 103  15 h(2g)pp Ks(p0p0) 62  9 Total1421 46 h’h(2g)pp KL 392  37 h(3p)pp KL 62  13 Total 454  39

  16. hep-ex/0608039 TCPV in B0gh'K0 Preliminary “sin2f1” = +0.64  0.10(stat)  0.04(syst) A = -0.01  0.07(stat)  0.05(syst) Dt distribution and asymmetry • Consistent with the SM • Consistent with Belle 2005 (Belle 2005: “sin2f1” = +0.620.120.04) • First observation of TCPV • (5.6s) in a single bgs mode • h'KS and h'KL combined • background subtracted • good tags • Dt g –Dt for h'KL

  17. hep-ex/0607100 B0gh'K0 93641 h'KS signal 16821 h'KL signal

  18. hep-ex/0607100 TCPV in B0gh'K0 Preliminary “sin2b” = +0.55  0.11(stat)  0.02(syst) A = +0.15  0.07(stat)  0.03(syst) “sin2b” 4.9s from zero. Cf. BaBar 2005: “sin2b” = +0.36  0.13  0.03

  19. KS+- : KSgp+p- KS00 : KSgp0p0 Reconstruction modes

  20. Vertex Reconstruction with KS Extrapolate KS track to the Interaction Point Vertex reconstruction efficiency with a single KS : 30 to 45% (Belle), 60% (BaBar KSp0) Events without the vertex can still be used for A-term measurement. Ks track p+ p- IP profile BCP vertex J/yKS with the KS Vertexing Validity confirmed with J/yKS as a control sample. Raw asymmetry good tag

  21. hep-ex/0608039 TCPV in B0gKSKSKS Preliminary “sin2f1” = +0.30  0.32(stat)  0.08(syst) A = +0.31  0.20(stat)  0.07(syst) Dt distribution and asymmetry B0 mass • background subtracted • good tags 15714 KS +-KS +-KS+- 289 KS +-KS +-KS00 18517 total

  22. hep-ex/0607108 TCPV in B0gKSKSKS Preliminary “sin2b” = +0.66  0.26(stat)  0.08(syst) A = +0.14  0.22(stat)  0.05(syst) Dt distribution and asymmetry 11612 KS +-KS +-KS+- 6012 KS +-KS +-KS00 17617 total mB & mmiss instead of mES & DE

  23. hep-ex/0607096 TCPV in B0gp0KS 425  28 p0KSsignal Preliminary missing mass & mB “sin2b” = +0.33  0.26(stat)  0.04(syst) A = -0.20  0.16(stat)  0.03(syst)

  24. hep-ex/0609006 TCPV in B0gp0KS Raw Asymmetry B0 mass 515  32 p0KSsignal good tags Preliminary “sin2f1” = +0.33 0.35(stat)  0.08(syst) A = -0.05  0.14(stat)  0.05(syst)

  25. hep-ex/0609006 TCPV in B0gKS Raw Asymmetry 118  18 KSsignal good tags B0 mass Preliminary “sin2f1” = +0.11 0.46(stat)  0.07(syst) A = -0.09  0.29(stat)  0.06(syst)

  26. hep-ex/0607101 “sin2b” = +0.62 (stat)  0.02(syst) A = +0.43 (stat)  0.03(syst) +0.25 -0.30 +0.23 -0.25 TCPV in B0gwKS 142  17wKSsignal Preliminary

  27. Smaller than bgccs in all of 9 modes Summary Theory tends to predict SM contamination in positive side Naïve average of all b g s modes sin2beff = 0.52 ± 0.05 2.6 s deviation More statistics crucial for mode-by-mode studies

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