A search for the rare decays Bs0→μ+μ- and B0→μ+μ- is performed at the LHCb experiment. The data analyzed correspond to an integrated luminosity of 1  fb-1 of pp collisions at a center-of-mass energy of 7 TeV and 2  fb-1 at 8 TeV. An excess of Bs0→μ+μ- signal candidates with respect to the background expectation is seen with a significance of 4.0 standard deviations. A time-integrated branching fraction of B(Bs0→μ+μ-)=(2.9-1.0+1.1)×10-9 is obtained and an upper limit of B(B0→μ+μ-)<7.4×10-10 at 95% confidence level is set. These results are consistent with the standard model expectations.

Measurement of the B_{s}^{0}→μ^{+}μ^{-} Branching Fraction and Search for B^{0}→μ^{+}μ^{-} Decays at the LHCb Experiment

BALDINI, Wander;BOZZI, Concezio;FIORE, Marco;SAVRIE', Mauro;
2013

Abstract

A search for the rare decays Bs0→μ+μ- and B0→μ+μ- is performed at the LHCb experiment. The data analyzed correspond to an integrated luminosity of 1  fb-1 of pp collisions at a center-of-mass energy of 7 TeV and 2  fb-1 at 8 TeV. An excess of Bs0→μ+μ- signal candidates with respect to the background expectation is seen with a significance of 4.0 standard deviations. A time-integrated branching fraction of B(Bs0→μ+μ-)=(2.9-1.0+1.1)×10-9 is obtained and an upper limit of B(B0→μ+μ-)<7.4×10-10 at 95% confidence level is set. These results are consistent with the standard model expectations.
2013
R., Aaij; B., Adeva; M., Adinolfi; C., Adrover; A., Affolder; Z., Ajaltouni; J., Albrecht; F., Alessio; M., Alexander; S., Ali; G., Alkhazov; P., Alva...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11392/2090412
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