Decays of beauty hadrons measured in CMS and ATLAS

The ATLAS and CMS data collected in pp collisions during 2010 and 2011 allowed a good quality of B-physics measurements, reproducing essential b-hadron properties, such as masses and lifetimes, and demonstrating a good performance of the two detectors within an increas­ ing instantaneous luminosity of the LHC machine. These features enabled in particular a measurement of rare B decays with a precision that contributes to the LHC potential along with the LHCb experiment dedicated to B-physics. The CMS and AT LAS results on searches for $B^0_s \to µ^+ µ^-$ and $B^0 \to µ^+ µ^-$ decays with 2011 data are reported here.