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Study of the two-body nonleptonic Bc(2S) weak decays with the QCD factorization approach

Na Wang1,*, Yueling Yang2,†, and Junfeng Sun2,‡

  • *Contact author: wangna@haut.edu.cn
  • †Contact author: yangyueling@htu.edu.cn
  • ‡Contact author: sunjunfeng@htu.edu.cn
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Phys. Rev. D 112, 076029 – Published 23 October, 2025

DOI: https://doi.org/10.1103/f56z-g713

Abstract

Inspired by the promising prospect of the Bc(2S) meson at the coming HL-LHC experiments, the nonleptonic Bc(2S) meson weak decays induced by both the b and c decays are investigated with the quantum chromodynamics (QCD) factorization approach. It is found that branching ratios for the color- and Cabibbo-Kobayashi-Maskawa (CKM)-favored Bc(2S)→Bsρ, Bsπ decays can reach up to O(10−9), which might be measurable. The Bc(2S) decays into the final states containing one charmonium are highly suppressed by the CKM factors, and have significantly small branching ratios, O(10−12) and less, which might be outside the future measurement capability. This paper provides a ready reference for the future experimental study on the hadronic Bc(2S) weak decays.

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Phys. Rev. D 112, 076029– Published 23 October, 2025
  • Received 25 August 2025
  • Accepted 6 October 2025
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