Hyperon Semileptonic decay constants with flavor SU(3) symmetry breaking

TL;DR

This paper uses a chiral soliton model to determine hyperon semileptonic decay constants and axial-vector transition constants, fitting parameters with experimental baryon data to provide precise decay constant values.

Contribution

It provides a comprehensive calculation of hyperon decay constants within a SU(3) symmetry breaking framework, unambiguously determining parameters from experimental data.

Findings

All hyperon semileptonic decay constants were determined precisely.

The model successfully reproduces experimental baryon masses and magnetic moments.

Results include axial-vector transition constants from decuplet to octet baryons.

Abstract

We investigate the hyperon semileptonic decay constants, $f_2/f_1$, and $g_1/f_1$, within a general framework of a chiral soliton model. All relevant parameters for the SU(3) baryon wave functions were unambiguously determined by using the experimental data for the masses of the baryon octet and the decuplet. Using then the existing experimental data for the magnetic moments of the baryon octet and the decay constants of hyperon semileptonic decays, we are able to determine all the hyperon semileptonic decay constants $f_2/f_1$ and $g_1/f_1$ of the baryon octet unequivocally. In addition, we also present the results of the axial-vector transition constants from the baryon decuplet to the octet.