Phys. Rev. Lett.
Search for Bs –> mu+mu– and B0 –> mu+mu– decays in pp collisions at 7 TeV
2011-07-28, by Achintya Rao
Read the paper: BPH-11-002
The observed numbers of events in both decay modes are consistent with those expected in the Standard Model.
Upper limits on the branching fraction have been determined at 90% and 95% confidence levels (CL).
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