Measurement of the B0s→μ+μ− branching fraction and search for B0→μ+μ− decays at the LHCb experiment
- Back, J. J.
- Craik, Daniel
- Dossett, D.
- Gershon, T. J.
- Kreps, Michal
- Latham, Thomas
- Pilar, T.
- Poluektov, Anton
- Reid, Matthew M.
- Silva Coutinho, R.
- Wallace, Charlotte
- Whitehead, M. (Mark)
- Williams, M. P.
- HASH(0x558e7bb13440)
Publication date
September 2013
DOI Publisher
American Physical Society Language
EnglishAbstract
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
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