# Study of the rare decays of B0s and B0 into muon pairs from data collected during the LHC Run 1 with the ATLAS detector

Abstract : A study of the decays B0→μ+μ− and B0s→μ+μ− has been performed using data corresponding to an integrated luminosity of 25 fb−1 of 7 TeV and 8 TeV proton--proton collisions collected with the ATLAS detector during the LHC Run 1. For B0, an upper limit on the branching fraction is set at B(B0→μ+μ−)<4.2×10−10 at 95% confidence level. For B0s, the branching fraction B(B0s→μ+μ−)=(0.9+1.1−0.8)×10−9 is measured. The results are consistent with the Standard Model expectation with a p-value of 4.8%, corresponding to 2.0 standard deviations.

http://hal.in2p3.fr/in2p3-01304245
Contributor : Claudine Bombar <>
Submitted on : Tuesday, April 19, 2016 - 2:09:48 PM
Last modification on : Friday, April 3, 2020 - 11:16:15 AM

### Citation

M. Aaboud, Z. Barnovska, N. Berger, M. Delmastro, L. Di Ciaccio, et al.. Study of the rare decays of B0s and B0 into muon pairs from data collected during the LHC Run 1 with the ATLAS detector. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2016, 76, pp.513. ⟨10.1140/epjc/s10052-016-4338-8⟩. ⟨in2p3-01304245⟩

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