Studies of B*s2(5840)0 and Bs1(5830)0 mesons including the observation of the B*s2(5840)0 to B0 K0S decay in proton-proton collisions at sqrt(s) = 8 TeVстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 20 декабря 2018 г.
Аннотация:Measurements of B∗s2(5840)0 and Bs1(5830)0 mesons are performed using a data sample of proton-proton collisions corresponding to an integrated luminosity of 19.6 fb−1, collected with the CMS detector at the LHC at a centre-of-mass energy of 8 TeV. The analysis studies P-wave B0S meson decays into B(∗)+K− and B(∗)0K0S, where the B+ and B0 mesons are identified using the decays B+→J/ψK+ and B0→J/ψK∗(892)0. The masses of the P-wave B0S meson states are measured and the natural width of the B∗s2(5840)0 state is determined. The first measurement of the mass difference between the charged and neutral B∗ mesons is also presented. The B∗s2(5840)0 decay to B0K0S is observed, together with a measurement of its branching fraction relative to the B∗s2(5840)0→B+K− decay.