Journal
PHYSICAL REVIEW LETTERS
Volume 124, Issue 15, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.124.152001
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Funding
- U.S. Department of Energy
- National Science Foundation
- Natural Sciences and Engineering Research Council (Canada)
- Institute of High Energy Physics (China)
- Commissariat a l'Energie Atomique (France)
- Institut National de Physique Nucleaire et de Physique des Particules (France)
- Bundesministerium fur Bildung und Forschung (Germany)
- Deutsche Forschungsgemeinschaft (Germany)
- Istituto Nazionale di Fisica Nucleare (Italy)
- Foundation for Fundamental Research on Matter (The Netherlands)
- Research Council of Norway
- Ministry of Science and Technology of the Russian Federation
- Alexander von Humboldt Foundation
- Particle Physics and Astronomy Research Council (United Kingdom)
- CONACyT (Mexico)
- A. P. Sloan Foundation
- Research Corporation
- Science and Technology Facilities Council [ST/S000879/1] Funding Source: researchfish
- STFC [ST/S000879/1] Funding Source: UKRI
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A study of the two-body decays B-+/- -> Xc (c) over barK +/-, where X-c (c) over bar 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 3 sigma level. The absolute branching fraction B[B+ -> X(3872)K+] = [2.1 +/- 0.6(stat) +/- 0.3(syst)] x 10(-4) is measured for the first time. It follows that B[X(3872) -> J/psi pi(+)pi(-)] = (4.1 +/- 1.3)%, supporting the hypothesis of a molecular component for this resonance.
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