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Título: | Measurements of the Absolute Branching Fractions of B± →k±Xc c |
Autor: | Babar Collaboration; Lees, J. P.; Martínez-Vidal, Fernando CSIC ORCID; Oyanguren, Arantza CSIC ORCID | Fecha de publicación: | abr-2020 | Editor: | American Physical Society | Citación: | Physical Review Letters 124: 152001 (2020) | Resumen: | A study of the two-body decays B±→XccK±, where Xcc 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. | Versión del editor: | http://dx.doi.org/10.1103/PhysRevLett.124.152001 | URI: | http://hdl.handle.net/10261/233194 | DOI: | 10.1103/PhysRevLett.124.152001 | Identificadores: | doi: 10.1103/PhysRevLett.124.152001 issn: 1079-7114 |
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