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Article Dans Une Revue Physical Review Letters Année : 2015

Observation of the B0s→η′η′ decay

O. Leroy
J. Serrano

Résumé

The first observation of the B0s→η′η′ decay is reported. The study is based on a sample of proton-proton collisions corresponding to 3.0 fb−1 of integrated luminosity collected with the LHCb detector. The significance of the signal is 6.4 standard deviations. The branching fraction is measured to be [3.31±0.64(stat)±0.28(syst)±0.12(norm)]×10−5, where the third uncertainty comes from the B±→η′K± branching fraction that is used as a normalisation. In addition, the charge asymmetries of B±→η′K± and B±→ϕK±, which are control channels, are measured to be (−0.2±1.3)% and (+1.7±1.3)%, respectively. All results are consistent with theoretical expectations.

Dates et versions

in2p3-01135965 , version 1 (26-03-2015)

Identifiants

Citer

R. Aaij, Y. Amhis, S. Barsuk, M. Borsato, O. Kochebina, et al.. Observation of the B0s→η′η′ decay. Physical Review Letters, 2015, 115, pp.051801. ⟨10.1103/PhysRevLett.115.051801⟩. ⟨in2p3-01135965⟩
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