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CP Violation and Rare R Decays

CP Violation and Rare R Decays. Paoti Chang National Taiwan University From LHC to the Universe NTU, Taipei December 15, 2008. KM Mechanism. CP violation is due to a complex phase in quark mixing matrix. f 2 ( a ). V ud V* ub. V td V* tb. Unitarity Matrix

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CP Violation and Rare R Decays

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  1. CP Violation and Rare R Decays Paoti Chang National Taiwan University From LHC to the Universe NTU, Taipei December 15, 2008 from LHC to the Universe

  2. KM Mechanism CP violation is due to a complex phase in quark mixing matrix f2(a) VudV*ub VtdV*tb Unitarity Matrix VudV*ub + VcdV*cb +VtdV*tb = 0 f3(g) f1(b) VcdV*cb from LHC to the Universe

  3. NobelPrize 2008 from LHC to the Universe

  4. Time dependent CP Asymmetry • Asymmetry in Dt shape implies ICPV. • Difference in area indicates DCPV from LHC to the Universe

  5. Measurement in Principle • Fully reconstruct a CP eigenstate. • Determine the flavor the tag side. • From the distance of the two B decay vertices to • measure the decay time difference. from LHC to the Universe

  6. Is there New physics? • Is KM mechanism the source of CPV? (Main reason why B factory was built?) • Is it the only source? New Physics? • NP may appear in rare B decays. • clean probe for NP. fBs not covered Current Universe  SM not enough Direct or Indirect CP violation, branching fraction… from LHC to the Universe

  7. The Duel of B Factories Mt. Tsukuba from LHC to the Universe

  8. Successful Operation BFactory is also a t-charm factory. peak L =1.71x1034 Bs physics can be studied when runs at U(5S) peak L =1.21x1034 from LHC to the Universe

  9. Results from LHC to the Universe

  10. Measurement of f1/b CP violation in the B system was already established. from LHC to the Universe

  11. From all Measurements B factories: df1~2o, df2 ~10o, df3 ~15o-30o from LHC to the Universe

  12. s s s s s d d Time dependent CPV in b→s Penguin Sf = sin2f1; Cf = -A golden mode +  sin2f1/sin2b DS = sin2f1(sqq)– sin2f1(ccs) • May have tree pollution. • Theoretical expectation: for penguin dominant modes DS>0 within 0.05 • Clean signals for new physics New physics phase in the loop causes deviation Stand Model  DS ~ 0 s d d from LHC to the Universe

  13. DS results before ICHEP 2008 PRL 99, 161802 (2007) Based on KKK Dalitz analysis 535 M PRL 98, 031802 (2007) For most modes, DS(SM) is positive. h'K0: sin2f1eff: +0.64± 0.10 ± 0.04 from LHC to the Universe

  14. Decay Modes with Updated Results • Class A: h’K0, wKS  Same method as J/Y K0 • Class B: K0p0 • Class C: p+p-KS, K+K-KS • Class D: fKSp0 : • No tracks on B decay vertex. • Require tacks with SVD hits. • Perform fit by constraining C. • Model the Dalitz distributions. • Many parameters: phase, • S and C for each mode …. Low statistics. Need to know the CP content. Use results from fK+p-. Class is characterized by the analysis complexity. from LHC to the Universe

  15. f1 measured with penguins from LHC to the Universe

  16. Time dependent Dalitz from LHC to the Universe

  17. f1/b with all penguin modes from LHC to the Universe

  18. + 0.006 -0.107± 0.016 BaBar Direct CP Violation in B→Kp Decays New Update Belle Results: Nature 452, 332 (2008) { - 0.004 -0.094± 0.018 ± 0.008 Belle Acp(K+p-) = -0.086± 0.023 ± 0.009 CDF -0.04± 0.16 ± 0.02 CLEO + 0.012  -0.098 @ 8.1sAVG - 0.011 { +0.030± 0.039± 0.010BaBar Acp(K+p0) = +0.07± 0.03± 0.01 Belle -0.29± 0.23± 0.02CLEO  +0.050± 0.025 @ 2.0sAVG DAKp = Acp(K+p-) - Acp(K+p0)= -0.147± 0.028 @ 5.3s from LHC to the Universe

  19. DAKp Puzzle /T Expectation from current theory T & P are dominant  DAKp ~ 0 T P C PEW T P • Enhancement of large C with large strong phase to T  strong inter. !? • Enhancement of large PEW  Newphysics Yoshikawa 2003; Mishima & Yoshikawa 2004; Buras et. al. 2004, 2006; Baek & London 2007; Hou et. al. 2007; Feldmann, Jung & Mannel 2008 Chiang et. al. 2004 Li, Mishima & Sanda 2005 from LHC to the Universe

  20. Acp(K0p0) DA(Kp) • Sum rule predicts Acp(K0p0) = -0.151±0.043 Model independent checks for NP • M. Gronau, PLB 627, 82 (2005); D. Atwood & A. Soni, Phys. Rev. D 58,036005(1998). New B+→ K0p+ B0→ K0p0 Sum rule A = -0.13 ± 0.13 ± 0.03 A = +0.14 ± 0.13 ± 0.06 HFAG AVG: -0.01 ± 0.10 P dominants. Acp(K0p+)~ 0 World Average Important topic for Super B factory Acp(K0p+)= 0.009±0.025 from LHC to the Universe

  21. First observation of direct CP violation in charged B decays • Dalitz analysis on B+ K+p+p- 657M BB, BELLE-CONF-0827 383M BB, PRD78, 012004, 08 B+ B- B- B+ all cosq >0 K+ cosq < 0 q p- p+ r0 ,f0 +3 ACP (B±→r0K±) =(+41±10±3 )% @4.0s -7 +5 ACP (B±→r0K±) =(+44±10±4 )% @3.7s -13 from LHC to the Universe

  22. B+→t+n • In SM, decay rate related to decay constant and Vub + 0.09 B(B→tn)= ( 0.78 )x10-4 (CKM fitter 2008 prediction) - 0.13 • Charged Higgs may contribute to BF. destructive W.S. Hou, PRD 48, 2342 (1993) • Previous results: Belle hadronic tag BaBar hadronic & semileptonic tags +0.56+0.46 B(B→tn) = (1.79) x 10-4 B(B→tn) = (1.2 ± 0.4 ± 0.3 ± 0.2) x 10-4 -0.49-0.51 383 M BBwith2.6s 447 M BBwith3.5s from LHC to the Universe

  23. + 0.38+ 0.35 B(B→tn)= (1.65 )x10-4 - 0.37- 0.37 New Belle Result on B+→t+n NEW with 3.8s 657 M BB with D(*)l n tag • Tag on D(*)ln • Search for t→euu, mnn, pn • Check extra energy in ECAL • Understand background from the control sample Larger parameter space signals exclude +36 +20 Nsig = 154 (stat) (syst) -35 -22 from LHC to the Universe

  24. New BaBar Result on B+→t+n Tag on D(*)ln, look for t→enn, mnn, pn, rn from LHC to the Universe

  25. +0.9 -0.8 Tension in the CKM fit Belle (Bx104) BaBar (Bx104) My Avg. B = (1.73±0.35)x10-4 +0.56+0.46 Had. Tags 1.79 1.8 ±0.4 -0.49+0.51 +0.38+0.35 Dln Tags 1.65 1.8±0.8±0.1 -0.37-0.37 +0.09 deviation = 2.6 s • CKM fitter obtained B = (0.78 ) x10-4 -0.13 • B = (1.2 ±0.4) x10-4 using Note that interference is destructive in 2HDM (type II). B >BSM implies that H+ contribution dominates from LHC to the Universe

  26. B (B→tn) vs sin2f1/2b • Using ratio, the relation is • independent of fB and Vub • Belle and BaBar will • have new updates soon. • Good topics for the • future Super B factory 1s deviation from LHC to the Universe

  27. B (B→Xsg) | Eg > 1.6 GeV SM New physics B→Xsg arXiv:0804.1580 Belle update with Eg >1.7 GeV: Eg min SM NNLO calculation: { HFAG 2008: (3.15±0.23)x10-4 Misiak et al. B ( B→Xs g ) | = (3.52±0.25)x10-4 = (2.98±0.26)x10-4 Becher Neubertv Eg > 1.6 GeV (3.47±0.49)x10-4 Anderson Gardi from LHC to the Universe

  28. Charged Higgs Bound The 95% lower bound of charged Higgs mass as a function of B(B→Xsg) and its error. HFAG 2008 . MH+ > 300 GeV/c2 @ 95% C.L. for all tanb from LHC to the Universe

  29. b→ s l+ l- • Loop dominant Small BF ; good place for new physics! • Contributions from three coefficients: C7 : EM penguin; C9 (C10 ): vector (axial vector) part of weak diagrams • More observables sensitive to NP: Leff = S Ci Oi , Ci (short distance effect). SM expects real Ci eff eff eff • AFB(q2): • e+e-m+m- indication of Z0 • b  s l+ l-: - FB lepton asymmetry, AFB - K* polarization, FL - CP asymmetry, ACP - Isospin asymmetry - e/m ratio SM  from LHC to the Universe

  30. Obtain partial BF in 6 bins in q2; extrapolate the total BF. BF(BK*ll)=(10.8±1.0±0.9) x10-7 BF(BKll)=(4.8 ±0.3) x10-7 Good agreement with SM BF 657M, NEW 384M FPCP 08 • BF(BK*ll)=(11.1±1.9±0.7) x10-7 • BF(BKll)=(3.9±0.7±0.2) x10-7 +0.5-0.4 photon pole BK*ll BKll Veto events in the J/y and y’ regions -- Belle, ICHEP 08 --BABAR, FPCP 08 -- Melikhov et. al (quark model, PLB 410, 1997) -- Ali (PRD 66, 034002, 290, 2002) from LHC to the Universe

  31. Obtain partial BF in 6 bins in q2; extrapolate the total BF. BF(BK*ll)=(10.8±1.0±0.9) x10-7 BF(BKll)=(4.8 ±0.3) x10-7 -- Belle, 08’ ICHEP -- BABAR, 08’ FPCP -- CDF, 06’ CKM Ali 02’ Good agreement with SM BF 657M, NEW 384M FPCP 08 • BF(BK*ll)=(11.1±1.9±0.7) x10-7 • BF(BKll)=(3.9±0.7±0.2) x10-7 +0.5-0.4 photon pole BK*ll BKll Veto events in the J/y and y’ regions -- Belle, ICHEP 08 --BABAR, FPCP 08 -- Melikhov et. al (quark model, PLB 410, 1997) -- Ali (PRD 66, 034002, 290, 2002) from LHC to the Universe

  32. B (B→K(*) ee) RK = (*) B (B→K(*)mm) Lepton Flavor & CP Asymmetries * • In SM, RK ~ 1.33 and RK ~1.0. • RK is sensitive to the size of photon pole. • RK >1.0 in the two Higgs doublet model with large tanβ. (Y. Wang and D. Atwood, PRD 68, 094016, 2003) * ACP from LHC to the Universe

  33. Unexpectedly Large Isospin Asymmetry? A = from LHC to the Universe

  34. K* Helicity Distribution Obtain FL by a fit: from LHC to the Universe

  35. Anomalous AFB(q2) in B→ K(*) ll ? Obtain AFB by a fit: Efficiency corrected 384 M BB 657 M BB Data show positive AFB at low q2, while the SM predicts negative AFB. At high q2, data above the SM expectation. from LHC to the Universe

  36. Conclusion • Results start to probe NP but limited by statistics: • B → tn, AFB, isospin asymmetry •B (BXsg) strong constraint to NP • Needmuch more data to confirm theDS puzzle. DA explanation  if from new physics, what is it? • LHCb: fBs, AFB on K*ll, Bs,d ll, … Super B factory: B → tn, K*nn, Acp(K0p0), ... • Look for the approval of Super KEKB in 2009! from LHC to the Universe

  37. Backup Slides from LHC to the Universe

  38. More on AFB SM • C7 = - C7 ? If yes, B will change! • The sign of C7 is constrained by B (Xsll). • C may be complex due to new physics. Gambino et. al, PRL94, 061803, 05 Hou et. Al, PRD77, 014016, 08 Black line: SM Blue: 4th generation Points LHCb 2 fb-1 MC Dashed area: complex C ŝ = q2/M2 (l+l-) from LHC to the Universe

  39. Direct CP Violation on B →Xsg BaBar measurement using sum of 16 exclusive modes arXiv: 0805.4796 383 M BB SM expectation by Kagan & Neubert, PRD58, 094012 (1998) ACP ~ (0.5±0.2)%  small CP asymmetry ACP = -0.011± 0.030 (stat.) ± 0.014 (syst.) from LHC to the Universe

  40. gL M12 - - - - + B0 gR K*0 B0 K*0 tCPV on Radiative Penguin gRms/mb suppressed • No CPV seen before; this conference: Interference suppressed in SM gLms/mb suppressed K0p0g K0p+p-g K0hg K* region 1.2<M(Kp)<1.6 from LHC to the Universe

  41. TCPV on B0K0p0 NEW 556± 32 evts For S, use candidates with SVD hits For C, all signals KSp0 657± 37 evts KLp0 239± 47 evts First Try from LHC to the Universe

  42. TCPV on B0K0p0 NEW 556± 32 evts For S, use candidates with SVD hits For C, all signals BaBar Belle S +0.55±0.20±0.03 +0.67±0.31±0.08 C=-A +0.13±0.13±0.03 -0.14±0.13±0.06 KSp0 657± 37 evts KLp0 239± 47 evts First Try from LHC to the Universe

  43. TCPV on h'K0, wKS and fKSp0 NEW final dataset 467 M BB wK0 • See Hirschauer’s talk for details. • For fK0p0, polarizations, yields, Acp … are constrained with fK+p- • SC = -A • h'K0+0.57±0.08±0.02 -0.08±0.06±0.02 • wKS +0.55 ±0.02-0.52 ±0.03 • f(KSp0 )0+0.97 +0.20±0.14±0.06 +0.26 +0.22 -0.20 -0.29 +0.03 -0.52 from LHC to the Universe

  44. T-dependent Dalitz on p+p-K0 S NEW 657 M BB Decay modes considered: K*+(892)p-, K*+(1430)p-, r0K0, f0(980)KS, f0(1270)KS, fX(1300)K0, (KSp+)NR p-, (KS p-)NRp+, (p+p-)NRKS difference as systematic errors from LHC to the Universe

  45. T-dependent Dalitz on K+K-K0 NEW S Model uses: f0(980)KS,f(1020)KS, fX(1500)KS, cc0KS, (KSK+)NRK+, (K+K-)NRKS 657 M BB from LHC to the Universe

  46. Lb L mm EXP, SM MSSM C7geff>0 Future Prospects for AFB(q2) 5ab-1 MC study of SuperB 50 ab-1 MC study of SuperB LHCb 2fb-1 ATLAS 30 fb-1 from LHC to the Universe

  47. Lb L mm EXP, SM MSSM C7geff>0 Future Prospects for AFB(q2) CDF and D0, please contribute! 5ab-1 MC study of SuperB 50 ab-1 MC study of SuperB LHCb 2fb-1 ATLAS 30 fb-1 from LHC to the Universe

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