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Measurement of the Bs0μ+μ Branching Fraction and Search for B0μ+μ Decays at the LHCb Experiment

R. Aaij et al. (LHCb Collaboration)
Phys. Rev. Lett. 111, 101805 – Published 5 September 2013

Abstract

A search for the rare decays Bs0μ+μ and B0μ+μ is performed at the LHCb experiment. The data analyzed correspond to an integrated luminosity of 1fb1 of pp collisions at a center-of-mass energy of 7 TeV and 2fb1 at 8 TeV. An excess of Bs0μ+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(Bs0μ+μ)=(2.91.0+1.1)×109 is obtained and an upper limit of B(B0μ+μ)<7.4×1010 at 95% confidence level is set. These results are consistent with the standard model expectations.

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  • Received 18 July 2013

DOI:https://doi.org/10.1103/PhysRevLett.111.101805

This article is available under the terms of the Creative Commons Attribution 3.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

© 2013 CERN, for the LHCb Collaboration

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Measurement of the Bs0μ+μ Branching Fraction and Search for B0μ+μ with the CMS Experiment

S. Chatrchyan et al. (CMS Collaboration)
Phys. Rev. Lett. 111, 101804 (2013)

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Vol. 111, Iss. 10 — 6 September 2013

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