Work

Study of B c → J / ψ ( a 1 ( 1260 ) , b 1 ( 1235 ) , a 2 ( 1320 ) , K 2 * ( 1430 ) ) decays with a perturbative QCD approach

Year: 2026

Type: article

Abstract: Motivated by systematic observations of B c decays at LHCb, we analyze B c + → J / ψ ( A , T ) decays [where A denotes axial-vector mesons a 1 ( 1260 ) + , b 1 ( 1235 ) + , and T denotes tensor mesons a 2 ( 1320 ) + , K 2 * ( 1430 ) + ] within the perturbative QCD (pQCD) factorization framework. The framework employs light-cone distribution amplitudes to regulate nonperturbative dynamics, utilizing Sudakov suppression to control endpoint divergences. Our predictions indicate branching ratios of 10 − 3 – 10 − 2 for B c + → J / ψ A and 10 − 5 – 10 − 4 for B c + → J / ψ T decays, which seem to be in the reach of future experiments. We also provide predictions for the polarization fractions of these decays. Based on quark helicity analysis, the longitudinal polarization amplitudes are expected to dominate the branching ratios.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/h1fq-f8fr

Authors: Yun Zhao, Xian-Qiao Yu

Institution: Southwest University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funders: Strong, National Natural Science Foundation of China

Award: 大型强子对撞机上B物理唯象研究