Standard model matrix elements for neutralB-meson mixing and associated decay constants

Standard Model Matrix Elements for Neutral B-Meson Mixing and Associated Decay Constants

We present results of quenched lattice calculations of the matrix elements relevant for Bd−B̄d and Bs−B̄s mixing in the Standard Model. Results for the corresponding SU(3)-breaking ratios, which can be used to constrain or determine |Vtd|, are also given. The calculations are performed at two values of the lattice spacing, corresponding to β = 6.0 and β = 6.2, with quarks described by a mean-fiel...

Meson Supermultiplet Decay Constants

We use a covariant supermultiplet theory to determine the primary coupling constant associated with several types of two-body meson decay. Despite the diverse range of decays considered the primary coupling constant is surprisingly uniform. We envisage the extension of the techniques to heavy quark cases, including as preliminary examples the calculation of the D * + and D * 0 total decay width...

Standard-model predictions for CP violation in B0-meson decay.

Standard - model predictions for CP violation in 8 - meson decay

We examine the present set of constraints on the parameters of the standard model and use the unitarity triangle to present their allowed range. We give the implications of this for CP violation in the B-meson system as a function of top-quark mass, emphasizing what luminosity of an electronpositron collider is needed to guarantee a statistically significant asymmetry in one or more B decay cha...

B-meson decay constants and B −B0-mixing with domain-wall light and relativistic heavy quarks

We propose to continue and finish our determination of the B-meson leptonic decay constants fBd and fBs , the B−B0 mixing matrix elements, and their ratio, ξ ≡ fBs √ BBs/fBd √ BBd , on the 2+1 flavor dynamical domain-wall fermion gauge field configurations generated by the LHP, RBC, and UKQCD Collaborations. Using the relativistic heavy quark action we expect to obtain precise results which wil...