Standard Model Matrix Elements for Neutral B-Meson Mixing and Associated Decay Constants
نویسندگان
چکیده
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-field-improved Sheikholeslami-Wohlert action. As a by-product, we obtain the leptonic decay constants of B and D mesons. We also present matrix elements relevant for D0−D̄0 mixing. Our results are summarized in the Introduction.
منابع مشابه
ar X iv : h ep - l at / 9 80 90 18 v 3 2 M ar 2 00 0 1 Neutral B Meson Mixing and Heavy - Light Decay Constants from Quenched Lattice QCD ∗
We present high-statistics results for neutral B-meson mixing and heavy-light-meson leptonic decays in the quenched approximation from tadpole-improved clover actions at β = 6.0 and β = 6.2. We consider quantities such as BBd(s) , fDd(s) , fBd(s) and the full ∆B = 2 matrix elements as well as the corresponding SU(3)-breaking ratios. These quantities are important for determining the CKM matrix ...
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