Published April 17, 2020 | Version Published + Supplemental Material + Submitted
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Measurements of the Absolute Branching Fractions of B±→K±X_(cc)

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Abstract

A study of the two-body decays B±→X_(cc)K±, where X_(cc) 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.

Additional Information

© 2020 Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP3. Received 29 November 2019; revised manuscript received 22 January 2020; accepted 20 March 2020; published 16 April 2020. We are grateful for the extraordinary contributions of our PEP-II2 colleagues in achieving the excellent luminosity and machine conditions that have made this work possible. The success of this project also relies critically on the expertise and dedication of the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and the kind hospitality extended to them. This work is supported by the U.S. Department of Energy and National Science Foundation, the Natural Sciences and Engineering Research Council (Canada), Institute of High Energy Physics (China), the Commissariat à l'Energie Atomique and Institut National de Physique Nucléaire et de Physique des Particules (France), the Bundesministerium für Bildung und Forschung and Deutsche Forschungsgemeinschaft (Germany), the Istituto Nazionale di Fisica Nucleare (Italy), the Foundation for Fundamental Research on Matter (The Netherlands), the Research Council of Norway, the Ministry of Science and Technology of the Russian Federation, and the Particle Physics and Astronomy Research Council (United Kingdom). Individuals have received support from CONACyT (Mexico), the A. P. Sloan Foundation, the Research Corporation, and the Alexander von Humboldt Foundation.

Attached Files

Published - PhysRevLett.124.152001.pdf

Submitted - 1911.11740.pdf

Supplemental Material - supplement.pdf

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Additional details

Identifiers

Eprint ID
102599
Resolver ID
CaltechAUTHORS:20200417-111437287

Related works

Funding

Department of Energy (DOE)
NSF
Natural Sciences and Engineering Research Council of Canada (NSERC)
Institute of High Energy Physics (China)
Commissariat à l'Energie Atomique (CEA)
Institut National de Physique Nucléaire et de Physique des Particules (IN2P3)
Bundesministerium für Bildung und Forschung (BMBF)
Deutsche Forschungsgemeinschaft (DFG)
Istituto Nazionale di Fisica Nucleare (INFN)
Stichting voor Fundamenteel Onderzoek der Materie (FOM)
Research Council of Norway
Ministry of Science and Technology of the Russian Federation
Particle Physics and Astronomy Research Council (PPARC)
Consejo Nacional de Ciencia y Tecnología (CONACYT)
Alfred P. Sloan Foundation
Research Corporation
Alexander von Humboldt Foundation

Dates

Created
2020-04-17
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Updated
2023-03-16
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