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 S U(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.
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - 1 Nov 2001|