Lifetime difference in B_s mixing: Standard Model and beyond

Andriy Badin; Fabrizio Gabbiani; Alexey A. Petrov

paper

Lifetime difference in B_s mixing: Standard Model and beyond

arXiv:0909.4897

Abstract

We present a calculation of $1/ m_{b}^{2}$ corrections to the lifetime differences of $B_{s}$ mesons in the heavy-quark expansion. We find that they are small to significantly affect $ΔΓ$ $(B_{s})$ and present the result for lifetime difference including non-perturbative $1/ m_{b}$ and $1/ m_{b}^{2}$ corrections. We also analyze the generic $Δ B$ = 1 New Physics contributions to the lifetime difference of $B_{s}$ mesons and provide several examples

7 pages, 5 figures. To be published in the proceedings of DPF-2009, Detroit, MI, July 2009, eConf C090726. Presented by Andriy Badin at APS DPF 2009 meeting