  A search for the rare decays (Bs -> \mu \mu) and (B0 -> \mu\mu) performed in
pp collisions at sqrt{s} = 7 TeV is presented. The data sample, collected by
the CMS experiment at the LHC, corresponds to an integrated luminosity of 1.14
/fb. 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
BF(Bs -> \mu\mu) < 1.9 * 10^{-8} and BF(B0 -> \mu \mu) < 4.6 * 10^{-9} at 95%
confidence level (CL). Furthermore, the combination of the results of the
search for the decay (Bs -> \mu \mu) by the CMS and LHCb experiments is
presented. The combined upper limit is BF < 1.1 * 10^{-8} at 95% CL.

High Energy Physics - Experiment