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Search for the rare decays Bs->mu+mu- and Bd->mu+mu- with the LHCb experiment
Salle Andersson (CERN)
Decays of the B0 and B0s mesons into two muons are extremely rare in the Standard Model as they occur only via helicity suppressed loop diagrams. Their amplitudes can be significantly different in many New Physics models, especially with an extended Higgs sector.
Therefore, the search for these decays provides a sensitive probe of physics beyond the Standard Model. A search for the decays B0s ->mu+mu- and B0 ->mu+mu- is performed with about 37 pb-1 of pp collisions at sqrt(s) = 7TeV collected by the LHCb experiment at the Large Hadron Collider at CERN.
The analysis relies mostly on control samples with minimal use of the simulation. The observed numbers of events are consistent with the background expectations.
The resulting upper limits on the branching ratios are B(B0s->mu+mu-) < 56x10-9 and B(B0->mu+mu-) < 15x10-9 at 95% confidence level. The analysis is presented and prospects are also given for the coming run.
Video in CDS
M. Mangano, M. Spiropulu, G. Unal......................... Tea and Coffee will be served at 16h00