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Measurements of the Absolute Branching Fractions of B± →k±Xc c

Lees J. P.
•
Poireau V.
•
Tisserand V.
altro
Wu S. L.
2020
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
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.
DOI
10.1103/PhysRevLett.124.152001
WOS
WOS:000526038600003
Archivio
http://hdl.handle.net/11368/2975008
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85084842784
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.124.152001
Diritti
open access
license:creative commons
license uri:http://creativecommons.org/licenses/by/4.0/
FVG url
https://arts.units.it/bitstream/11368/2975008/1/PhysRevLett.124.152001.pdf
Soggetti
  • BaBar

  • PEP-II

  • B meson

  • Bottom meson

Web of Science© citazioni
13
Data di acquisizione
Mar 27, 2024
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