The qqbar S-wave axial-vector mesons in the covariant U~(12)-scheme

TL;DR

This paper investigates the properties of axial vector mesons a1 and b1 within the covariant U~(12)-scheme, analyzing their decay processes and comparing theoretical predictions with experimental data.

Contribution

It introduces a relativistic S-wave state description of axial vector mesons in the U~(12)-scheme and calculates their decay widths and amplitude ratios.

Findings

Calculated partial decay widths and amplitude ratios agree with experimental data.

Predicted radiative transition widths are consistent with observations.

The model provides a relativistic framework for axial vector meson properties.

Abstract

We study the properties of axial vector mesons a1 and b1 as relativistic S-wave states which are predicted in the U~(12)-scheme, through the analyses of their radiative and pionic decays. Specifically, partial widths of the strong a1 (b1) -> rho(omega) pi processes, their D/S-wave amplitude ratios, and radiative transition widths of a1(b1) -> pi gamma processes are calculated by using a simple decay interaction model, and made a comparison with the respective experimental values.