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B-meson decays to vector charmoniumlike states and a K meson: The role of final-state interactions

Qi-Wei Yuan1,2, Qi Wu3,*, and Ming-Zhu Liu1,2,†

  • *Contact author: wuqi@htu.edu.cn
  • †Contact author: liumz@lzu.edu.cn
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Phys. Rev. D 111, 114035 – Published 27 June, 2025

DOI: https://doi.org/10.1103/xrjr-zxpz

Abstract

A series of vector charmonium(like) states, accompanied by a K meson, have been observed in the decays of B meson. These processes are color-suppressed at the quark level, as inferred from topological diagram analysis. In this work, we calculate the branching fractions of the decays B→ψK, where ψ denotes the charmonium(like) states ψ(1S), ψ(2S), ψ(4040), ψ(3770), and ψ(4160). Our analysis incorporates both short-distance (naive factorization approach) and long-distance (final-state interactions) contributions. Within reasonable parameters, our results align with experimental data except for the ψ(4160), suggesting its possible exotic nature. Furthermore, we find that long-distance contributions dominate these decay processes, highlighting the crucial role of final-state interactions in the productions of charmonium(like) states in B decays.

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Phys. Rev. D 111, 114035– Published 27 June, 2025
  • Received 20 April 2025
  • Accepted 13 June 2025
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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.

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