Tetraquark mixing supported by the partial decay widths of two light-meson nonets

TL;DR

This paper provides evidence supporting the tetraquark mixing model for light-meson nonets by analyzing their partial decay widths, showing consistent coupling patterns that align with theoretical predictions.

Contribution

It demonstrates that experimental decay widths support the tetraquark mixing framework for light and heavy meson nonets, offering new evidence for this structure.

Findings

Light nonet couples more strongly to pseudoscalar mesons than the heavy nonet.

Partial decay widths align with tetraquark mixing predictions.

Supports the tetraquark mixing as a viable structure for light-meson nonets.

Abstract

Recently, the tetraquark mixing framework has been proposed as a possible structure for the two light-meson nonets in the $J^P=0^+$ channel, the light nonet composed of $a_0(980)$, $K_0^*(700)$, $f_0(500)$, $f_0(980)$, and the heavy nonet of $a_0(1450)$, $K_0^*(1430)$, $f_0(1370)$, $f_0(1500)$. Among various signatures, we report in this work that their partial decay widths collected from various experimental data in Particle Data Group (PDG) can support this mixing scheme also. In particular, we demonstrate that the couplings of the light nonet to two pseudoscalar mesons estimated from the partial widths are consistently stronger than those of the heavy nonet. This consistent feature agrees qualitatively well with the predictions from the tetraquark mixing framework and, therefore, provides supporting evidence for the tetraquark mixing.