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Title: Measurements of the Absolute Branching Fractions of B-+/- -> K(+/-)Xc(c)over-bar
Author: Graugés Pous, Eugeni
BABAR Collaboration
Keywords: Barions
Issue Date: 16-Apr-2020
Publisher: American Physical Society
Abstract: A study of the two-body decays B±→Xc¯cK±, where Xc¯c refers to one charmonium state, is reported by the BABAR Collaboration using a data sample of 424  fb−1. The absolute determination of branching fractions for these decays are significantly improved compared to previous BABAR measurements. Evidence is found for the decay B+→X(3872)K+ at the 3σ level. The absolute branching fraction B[B+→X(3872)K+]=[2.1±0.6(stat)±0.3(syst)]×10−4 is measured for the first time. It follows that B[X(3872)→J/ψπ+π−]=(4.1±1.3)%, supporting the hypothesis of a molecular component for this resonance.
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It is part of: Physical Review Letters, 2020, vol. 124 , num. 15, p. 152001
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ISSN: 0031-9007
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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