First observation of a baryonic $B_s^0$ decayстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 21 августа 2017 г.
Аннотация:We report the first observation of a baryonic B0s decay, B0s→pΛ¯¯¯K−, using proton-proton collision data recorded by the LHCb experiment at center-of-mass energies of 7 and 8 TeV, corresponding to an integrated luminosity of 3.0fb−1. The branching fraction is measured to be B(B0s→pΛ¯¯¯K−)+B(B0s→p¯ΛK+)=[5.46±0.61±0.57±0.50(B)±0.32(fs/fd)]×10−6, where the first uncertainty is statistical and the second systematic, the third uncertainty accounts for the experimental uncertainty on the branching fraction of the B0→pΛ¯¯¯π− decay used for normalization, and the fourth uncertainty relates to the knowledge of the ratio of b-quark hadronization probabilities fs/fd.