10.3204/DESY-PROC-2012-02/239
Simonetto, Franco
Franco
Simonetto
Search for the rare decays $B \rightarrow \mu^+\mu^-$ with the CMS detector.
Deutsches Elektronen-Synchrotron, DESY, Hamburg
2013
ConferencePaper
Physics
2013
en
Abstract
Proc. of DIS 2012, 367-370; DESY
I summarize here the results of a search for the rare decays $B^0
\rightarrow \mu^+\mu^-$ and $B^0_s\rightarrow \mu^+\mu^-$, based
on a sample of data collected by the CMS detector from $pp$ collisions
at $\sqrt{s} =7$ \TeV, corresponding to an integrated luminosity
of 4.9 \invfb . No excess of events over the expected background
is observed. The resulting upper limits on the branching fractions
are \mbox{${\cal B}(B_s^0 \rightarrow \mu^+ \mu^- ) < 7.7 \times
10^{-9}$} and \mbox{${\cal B}(B^0 \rightarrow \mu^+\mu^-) < 1.8 \times
10^{-9}$} at 95 \% confidence level.
Proc. of DIS 2012, 367 - 370; DESY-PROC-2012-02; ISSN 1435-8077