Study on the properties of the coupling constants of $J/\psi \rightarrow VP$ decays

TL;DR

This study analyzes the coupling constants in J/ψ to VP decays using experimental data, revealing differences between octet and singlet couplings, electromagnetic and mass breaking effects, and the phase angle between interactions.

Contribution

It provides a model-dependent analysis of coupling constants in J/ψ to VP decays, highlighting key differences and parameter values that deepen understanding of these decay processes.

Findings

Octet coupling constant g_8 is about twice g_1.

Electromagnetic breaking parameters g^i_E are larger than mass breaking parameters g^i_M.

Phase angle between strong and electromagnetic interactions is 70° to 80°.

Abstract

Basing on the branching fractions of J/\psi \to VP from different experiments, we investigate on the properties of the coupling constants of J/\psi \to VP decays with a model-dependent approach. We find that the octet coupling constant, g_8, of strong interaction is about twice larger than that of the singlet coupling constant g_1; the electromagnetic breaking parameters g^i_E are larger than the mass breaking parameters g^i_M, moreover, the three parameters of electromagnetic effect are about equal, but the three parameters of mass effect are obviously different and their uncertainties are also large; and the phase angle between strong and electromagnetic interaction is in the range of 70^{\circ} \sim 80^{\circ}. It deepens our understanding of the coupling constant of J/\psi \to VP decays.