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Two Important Experimental Novelties:

Utfit & QCD in the Standard Model and beyond. + 0.56. + 0.39. - 0.49. - 0.46. Two Important Experimental Novelties:. CDF Δ m s = (17.77 ± 0.10 ± 0.07) ps -1. + 0.68. BaBar : (0.88 ± 0.11) x 10 -4. Belle : (1.79 ) x 10 -4. - 0.67.

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Two Important Experimental Novelties:

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  1. Utfit & QCDin the Standard Model and beyond + 0.56 + 0.39 - 0.49 - 0.46 Two Important Experimental Novelties: CDF Δms= (17.77 ± 0.10 ± 0.07) ps-1 + 0.68 BaBar: (0.88 ± 0.11) x 10-4 Belle: (1.79 ) x 10-4 - 0.67 Average: (1.31± 0.48) x 10-4 sin 2 measured = 0.726  0.0370.675  0.026 Dipartimento di Fisica di Roma La SapienzaGuido Martinelli Martina Franca 17/6/2007

  2. STANDARD MODEL Generalities Predictions vs Postdictions Lattice vs angles Vub inclusive, Vub exclusive vs sin 2 Experimental determination of lattice parameters Flavor Physics Beyond the SM

  3. N(N-1)/2 angles and (N-1)(N-2)/2 phases N=3 3 angles + 1 phase KM the phase generates complex couplings i.e. CP violation; 6 masses +3 angles +1 phase = 10 parameters

  4. NO Flavour Changing Neutral Currents (FCNC) at Tree Level (FCNC processes are good candidates for observing NEW PHYSICS) CP Violation is natural with three quark generations (Kobayashi-Maskawa) With three generations all CP phenomena are related to the same unique parameter (  )

  5. Quark masses & Generation Mixing e- -decays | Vud | = 0.9735(8) | Vus | = 0.2196(23) | Vcd | = 0.224(16) | Vcs | = 0.970(9)(70) | Vcb | = 0.0406(8) | Vub | = 0.00409(25) | Vtb | = 0.99(29) (0.999) W e down up Neutron Proton | Vud |

  6. The Wolfenstein Parametrization Vub + O(4) Vtd Sin12 =  Sin23 = A 2 Sin13 = A 3(-i )  ~ 0.2 A ~ 0.8  ~ 0.2  ~ 0.3

  7. The Bjorken-Jarlskog Unitarity Triangle | Vij | is invariant under phase rotations a1 b1 a1 = V11 V12* = Vud Vus* a2 = V21 V22* a3= V31 V32* d1 a2 b2 e1 a1 + a2 + a3 = 0 (b1 + b2 + b3 = 0 etc.) a3 b3 c3  a3 a2 Only the orientation depends on the phase convention a1  

  8. Physical quantities correspond to invariants under phase reparametrization i.e. |a1 |, |a2 |, … , |e3 | and the area of the Unitary Triangles a precise knowledge of the moduli (angles) would fix J J = Im (a1 a2 * ) = |a1 a2 | Sin  CP  J Vud*Vub+ Vcd*Vcb+Vtd*Vtb = 0  Vud*Vub Vtd*Vtb  = CKM   Vcd*Vcb

  9. From A. Stocchi ICHEP 2002

  10. For details see:UTfit Collaborationhep-ph/0501199hep-ph/0509219hep-ph/0605213hep-ph/0606167http://www.utfit.org

  11. sin 2 is measured directly from B J/ Ks decays at Babar & Belle (Bd0 J/ Ks , t) - (Bd0 J/ Ks , t) AJ/ Ks = (Bd0 J/ Ks , t) + (Bd0 J/ Ks , t) AJ/ Ks = sin 2 sin (md t)

  12. DIFFERENT LEVELS OF THEORETICAL UNCERTAINTIES (STRONG INTERACTIONS) First class quantities, with reduced or negligible uncertainties 2) Second class quantities, with theoretical errors of O(10%) or less that can be reliably estimated 3) Third class quantities, for which theoretical predictions are model dependent (BBNS, charming, etc.) In case of discrepacies we cannot tell whether is new physics or we must blame the model

  13. Classical Quantities used in the Standard UT Analysis levels @ 68% (95%) CL eK Vub/Vcb Dmd/Dms Dmd UT-LATTICE Inclusive vs Exclusive Opportunity for lattice QCD see later NEW !! before Only a lower bound

  14. 2005 Unitary Triangle SM semileptonic decays K0- K0 mixing B0d,s - B0d,s mixing Bd Asymmetry

  15. New Quantities used in the UT Analysis UT-ANGLES

  16. THE COLLABORATION M.Bona, M.Ciuchini, E.Franco, V.Lubicz, G.Martinelli, F.Parodi,M.Pierini, P.Roudeau, C.Schiavi,L.Silvestrini, V.Sordini, A.Stocchi, V.Vagnoni Roma, Genova, Annecy, Orsay, Bologna THE CKM 2006 ANALYSIS • New quantities e.g. B -> DK included • Upgraded exp. numbers (after ICHEP) • CDF & Belle new measurements www.utfit.org

  17. With the constraint fromms Results for  and  & related quantities contours @ 68% and 95% C.L.  = 0.164 ± 0.029 • = 0.193  0.029  = 0.355  0.019 • at 95% C.L.  = 0.340 ± 0.017  = (92.7  4.2)0 sin 2  = 0.697  0.023

  18. A closer look to the analysis: Predictions vs Postdictions Lattice vs angles Vub inclusive, Vub exclusive vs sin 2 Experimental determination of lattice parameters

  19. CKM origin of CP Violation in K0 K0 Mixing εK UTsites Ciuchini et al. (“pre-UTFit”),2000

  20. Comparison of sin 2  from direct measurements (Aleph, Opal, Babar, Belle and CDF) and UT analysis sin 2 measured = 0.668  0.028 correlation (tension) with Vub , see later sin 2 UTA = 0.759 ± 0.039 sin 2 UTA = 0.698 ± 0.066 prediction from Ciuchini et al. (2000) sin 2 UTA = 0.65 ± 0.12 Prediction 1995 from Ciuchini,Franco,G.M.,Reina,Silvestrini sin 2 tot = 0.701  0.022 Very good agreement no much room for physics beyond the SM !!

  21. Theoretical predictions of Sin 2 in the years predictions exist since '95 experiments sin 2 UTA = 0.65 ± 0.12 Prediction 1995 from Ciuchini,Franco,G.M.,Reina,Silvestrini

  22. NEWS from NEWS (Standard Model) ms Probability Density

  23. Theoretical predictions of msin the years predictions exist since '97 CDF A GREAT SUCCESS OF (QUENCHED) LATTICE QCD CALCULATIONS

  24. A closer look to the analysis: Predictions vs Postdictions Lattice vs angles Vub inclusive, Vub exclusive vs sin 2 Experimental determination of lattice parameters

  25. The UT-angles fit does not depend on theoretical calculations (treatement oferrors is not an issue) Comparable accuracy due to the precise sin2 value and substantial improvement due to the new ms measurement Crucial to improve measurements of the angles, in particular  (tree level NP-free determination) UT-angles UT-lattice Still imperfect agreement in  due to sin2 and Vub tension  = 0.139 ± 0.042  = 0.188 ± 0.036  = 0.373 ± 0.027  = 0.325± 0.021 ANGLES VS LATTICE

  26. A closer look to the analysis: Predictions vs Postdictions Lattice vs angles Vub inclusive, Vub exclusive vs sin 2 Experimental determination of lattice parameters

  27. ~2σ Correlation of sin 2  with Vub sin 2 measured = 0.668  0.028 sin 2 UTA = 0.759 ± 0.039 Although compatible, these results show that there is a ``tension” . This is due to the correlation of Vub with sin 2 

  28. S.Hashimoto@ICHEP’04 VUB PUZZLE Inclusive: uses non perturbative parameters most not from lattice QCD (fitted from the lepton spectrum) Exclusive: uses non perturbative form factors from LQCD and QCDSR

  29. 1) Use only exclusive and predict inclusive 2) Use only inclusive and predict exclusive pre-ichep

  30. Tension between inclusive Vub and the rest of the fit post-ichep INCLUSIVE EXCLUSIVE

  31. + 0.56 + 0.39 + 0.68 - 0.67 - 0.49 - 0.46 Belle: (1.79 ) x 10-4 BaBar: (0.88 ± 0.11) x 10-4 From BR(B→τντ) and Vub(UTA): B→τντ Average: (1.31± 0.48) x 10-4 Potentially large NP contributions(i.e. MSSM at large tanβ, Isidori & Paradisi) fB= (190 ± 14) MeV [UTA] Vub = (36.7 ± 1.5) 10-4 [UTA] (Best SM prediction) fB= (189 ± 27) MeV [LQCD] Vub = (35.0 ± 4.0) 10-4 [Exclusive] (Independent from other NP effects) fB= (189 ± 27) MeV [LQCD] Vub = (44.9 ± 3.3) 10-4 [Inclusive] INFN Roma I 11/06/2001

  32. fk  f e Vus INFN Roma I 11/06/2001

  33. INFN Roma I 11/06/2001

  34. INFN Roma I 11/06/2001

  35. Using Vud = 0.97377(27) (marciano) and Vus/Vud = 0.2260(5)(31) From fk  f we obtain Vus = 0.2200(5)(30) From Kl3 = 0.2255(9) INFN Roma I 11/06/2001

  36. Hadronic Parameters From UTfit A closer look to the analysis: Predictions vs Postdictions Lattice vs angles Vub inclusive, Vub exclusive vs sin 2 Experimental determination of lattice parameters

  37. The new measurements allow the analysis WITHOUT THE LATTICE HADRONIC PARAMETERS (eventually only those entering Vub) pre-ichep with Vub Without Vub

  38. IMPACT of the NEW MEASUREMENTS on LATTICE HADRONIC PARAMETERS Comparison between experiments and theory

  39. exps vs predictions fBs √BBs = 262  35 MeV lattice fBs √BBs=261  6 MeV UTA 2% ERROR !! • = 1.23  0.06 lattice  = 1.24  0.08 UTA BK = 0.75  0.09 BK = 0.79  0.04  0.08 Dawson fB = 186  0.11 MeV fB = 189  27 MeV SPECTACULAR AGREEMENT (EVEN WITH QUENCHED LATTICE QCD)

  40. exps vs predictions Using the lattice determination of the B-parameters BBd = BBs = 1.28  0.05 0.09 fB = 190  14 MeV fB = 189  27 MeV fBs = 229  9 MeV fBs= 230  30 MeV

  41. NEW OLD

  42. Only tree level processes CP VIOLATION PROVEN IN THE SM !! = 65 ± 20 U -115 ± 20 = 82 ± 19 U -98 ± 19 pre-ichep post-ichep

  43. CP Violation beyond the Standard Model

  44. Only tree level processes r = 0.00 ± 0.15 h = ± 0.41± 0.04 very important to improve: Vub/Vcb from semileptonic decays  from tree level processes CP VIOLATION PROVEN IN THE SM !!

  45. Even in the favourable case in which the theory above the cutoff is weakly coupled, such as in the Minimal Supersymmetric Standard Model (MSSM), large contributions to FCNC and CP processes are expected contrary to the increasigly precise experimental measurements. FLAVOUR PUZZLE

  46. FLAVOUR PUZZLE Model Independent Analysis of F = 2 transitions

  47. SM prediction (-1.06±0.09)10-3 Direct measurement (-0.3±5.0)10-3 SM peak NP contribution Additional contraints Semileptonic decay asymmetry Sensitive to both CBd and phase shift Bd Not precise enough to bound CKM in SM(experimental error too large)… … but good for reducing NP allowedparameter space

  48. SM peak NP contribution Additional contraints CP aymmetry in dimuon events fd~0.4, fs~0.1production fractions of Bd and Bs Admixture of Bd and Bs charge asymmetries Sensitive to CBd, Bd, CBs, Bs!

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