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

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

2000-11-07

arxiv.org/abs/hep-ph/0011086v2

Phys.Rev.D64:094501,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

27 pages (RevTeX), 26 figures, version published in Phys. Rev. D: improved estimate of the systematic error associated with th

Scientific paper

10.1103/PhysRevD.64.094501

We present results of quenched lattice calculations of the matrix elements relevant for B_d-\bar B_d and B_s-\bar B_s mixing in the Standard Model. Results for the corresponding SU(3)-breaking ratios, which can be used to constrain or determine |V_{td}|, are also given. The calculations are performed at two values of the lattice spacing, corresponding to \beta = 6.0 and \beta = 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 D^0-\bar D^0 mixing. Our results are summarized in the Introduction.

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