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Systematic analysis of the form factors of Bc to P-wave charmonia and corresponding weak decays

Jie Lu1,2, Dian-Yong Chen1,3,*, Guo-Liang Yu2,†, Zhi-Gang Wang2,‡, and Bin Wu2

  • 1School of Physics, Southeast University, Nanjing 210094, People’s Republic of China
  • 2Department of Mathematics and Physics, North China Electric Power University, Baoding 071003, People’s Republic of China
  • 3Lanzhou Center for Theoretical Physics, Lanzhou University, Lanzhou 730000, People’s Republic of China

  • *Contact author: chendy@seu.edu.cn
  • †Contact author: yuguoliang2011@163.com
  • ‡Contact author: zgwang@aliyun.com
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Phys. Rev. D 111, 114037 – Published 30 June, 2025

DOI: https://doi.org/10.1103/s1ym-ph27

Abstract

In this article, the vector, axial vector, and tensor form factors of Bc→χcJ (J=0, 1, 2) and Bc→hc are analyzed within the framework of three-point QCD sum rules. With the calculated vector and axial vector form factors, we directly study the decay widths and branching ratios of semileptonic decays Bc−→χcJlν¯l,hclν¯l (l=e, μ and τ) and analyze the nonleptonic decays Bc−→χcJπ−,χcJK−,χcJρ−,χcJK*−, Bc−→hcπ−,hcK−,hcρ−,hcK*− by using the naive factorization approach. These results can provide more information to understand the properties of Bc meson and P-wave charmonia and to study the heavy quark dynamics.

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Phys. Rev. D 111, 114037– Published 30 June, 2025
  • Received 12 February 2025
  • Accepted 5 June 2025
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