Strong decays of $a_0$, $f_0$, $f_2$, and $K^*_2$ resonances as dynamically generated states of two vector mesons

TL;DR

This paper investigates the strong decay processes of certain scalar and tensor meson resonances, modeling them as dynamically generated states from two vector mesons, and calculates their decay widths to compare with experimental data.

Contribution

It introduces a model treating these resonances as dynamically generated from vector meson interactions and computes decay widths considering triangular diagrams, providing new insights into their structure.

Findings

Decay width ratios align with previous results for most channels.

Differences observed in some decay channels suggest further experimental validation.

Emphasizes the need for precise measurements from future experiments.

Abstract

The two-body strong decays of the $f_0(1500)$, $f_0(1710)$, $a_0(1710)$, $f_2(1270)$, $f_2'(1525)$, and $K_2^*(1430)$ resonances are investigated, assuming them as dynamically generated states of two vector mesons via $s$-wave interactions. The partial decay widths of all the possible two-body pseudoscalar meson-pseudoscalar meson final states are calculated considering the triangular diagrams. It is found that the ratios of branching fractions are similar to the previous results for most channels, which were obtained by using the real-axis method and considering the box diagrams. However, there are also differences. In addition, our focus is on the partial decay widths. More precise experimental measurements are needed to test the model calculations and determine the nature of these scalar and tensor mesons. It is anticipated that the BES\uppercase\expandafter{\romannumeral3}, Belle\uppercase\expandafter{\romannumeral2} and LHCb collaborations will conduct these measurements in the future.