06 v 1 2 O ct 1 99 9 1 A lattice NRQCD computation of the bag parameters for ∆ B = 2 operators ∗
نویسندگان
چکیده
We present an update of our NRQCD calculation of BB at β=5.9 with increased statistics. We also discuss a calculation of BS, which is relevant to the width difference in the Bs − ¯ Bs mixing.
منابع مشابه
ar X iv : h ep - l at / 0 01 00 56 v 1 2 8 O ct 2 00 0 1 Perturbative renormalization of the ∆ B = 2 four - quark operators in lattice
We present a perturbative calculation of the renormalization constants for the ∆B = 2 four-quark operators, which is needed to evaluate the bag parameters BB and BS in lattice QCD. The one-loop coefficients are calculated for the O(1/M) NRQCD heavy quark action and the O(a)-improved Wilson action for light quark. Using these coefficients, which remove O(αs/aM) error, we reanalyze our previous c...
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