Strong decays $\Sigma^{*} \to\Sigma\pi,\Lambda \pi$ and related strong coupling constant

TL;DR

This paper calculates the strong coupling constant among certain baryons and mesons using light-cone QCD sum rules, analyzing the decay processes of $ ext{Sigma}^*$ baryons with a focus on SU(3) symmetry breaking effects.

Contribution

The study applies heavy baryon chiral perturbation theory combined with light-cone QCD sum rules to evaluate strong decay constants and analyze SU(3) breaking effects in baryon decays.

Findings

The calculated coupling constant $g$ aligns with previous results.

SU(3) breaking effects are small, less than 6%.

Large uncertainties prevent definitive conclusions.

Abstract

In this article, we calculate the strong coupling constant $g$ among the decuplet baryons, the octet baryons and the pseudoscalar mesons in the heavy baryon chiral perturbation theory with the light-cone QCD sum rules, and study the strong decays $\Sigma^* \to \Lambda \pi,\Sigma \pi$. The numerical value of the strong coupling constant $g$ is consistent with our previous calculation, the central values lead to small SU(3) breaking effects, less than 6%; and no definitive conclusion can be drawn due to the large uncertainties.