Strong decays of vector mesons to pseudoscalar mesons in the relativistic quark model

TL;DR

This paper models the strong decays of vector mesons into pseudoscalar mesons using a relativistic quark model, accurately matching experimental decay rates by incorporating relativistic effects and a consistent quark-antiquark potential.

Contribution

It introduces a comprehensive relativistic framework for meson decay calculations that accounts for wave function boosts and relativistic effects, improving agreement with experimental data.

Findings

Calculated decay rates agree well with experimental data.

Relativistic effects significantly influence decay matrix elements.

The model successfully describes light, heavy-light, and heavy quarkonia decays.

Abstract

Strong decays of vector ($^3S_1$) mesons to the pair of pseudoscalar ($^1S_0$) mesons are considered in the framework of the microscopic decay mechanism and the relativistic quark model based on the quasipotential approach. The quark-antiquark potential, which was previously used for the successful description of meson spectroscopy and electroweak decays, is employed as the source of the $q\bar q$ pair creation. The relativistic structure of the decay matrix element, relativistic contributions and boosts of the meson wave functions are comprehensively taken into account. The calculated rates of strong decays of light, heavy-light mesons and heavy quarkonia agree well with available experimental data.