Search for B_s⁰→μ⁺μ^- and B⁰→μ⁺μ^- decays in pp collisions at √s=7 TeV

Abstract

A search for the rare decays Bs0→ μ⁺μ^- and B⁰→μ⁺μ^- is performed in pp collisions at √ s=7 TeV, with a data sample corresponding to an integrated luminosity of 1.14 fb^-1, collected by the CMS experiment at the LHC. In both cases, the number of events observed after all selection requirements is consistent with expectations from background and standard-model signal predictions. The resulting upper limits on the branching fractions are (B_s⁰→μ⁺μ^-)<1.9x10^-8 and B(B⁰→μ⁺μ^-)<4.6x10^-9, at 95% confidence level.