# name
Measurement of the B0s→μ+μ− Branching Fraction and Search for B0→μ+μ− Decays at the LHCb Experiment

# metadata.dc.description.abstract[].value
A search for the rare decays B 0 s → μ + μ − and B 0 → μ + μ − is performed at the LHCb experiment. The data analyzed correspond to an integrated luminosity of 1     fb − 1 of p p collisions at a center-of-mass energy of 7 TeV and 2     fb − 1 at 8 TeV. An excess of B 0 s → 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 ( B 0 s → μ + μ − ) = ( 2.9 + 1.1 − 1.0 ) × 10 − 9 is obtained and an upper limit of B ( B 0 → μ + μ − ) < 7.4 × 10 − 10 at 95% confidence level is set. These results are consistent with the standard model expectations.

# metadata.dc.relation.ispartof[].value
Physical Review Letters, 2013, vol. 111, num. 10

# metadata.dc.rights[].value
cc by (c) CERN; LHCb Collaboration, 2013

# metadata.dc.source[].value
Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Measurement of the B0s→μ+μ− Branching Fraction and Search for B0→μ+μ− Decays at the LHCb Experiment