(No) New physics in B_s mixing and decay

Abstract

The status of possible new-physics signals in B_s,d-meson mixing and decay is reviewed. In particular, it is emphasized that the recent LHCb results, that find no evidence for a non-standard phase in B_s-barB_s mixing, make a consistent explanation of the D0 data on the like-sign dimuon charge asymmetry notoriously difficult. In order to clarify the inconclusive experimental situation, independent measurements of the semileptonic asymmetries are needed.

Comments: 7 pages, 3 figures, and 1 table; based on a talk given at Moriond Electroweak 2012; v2: Eqs. (16) and (17) corrected