Screening of quark charge and mixing effects on transition moments and M1 decay widths of baryons

TL;DR

This paper investigates how quark charge screening, isospin symmetry breaking, and state mixing influence the magnetic and transition properties of baryons, providing refined predictions for their decay widths based on heavy baryon mass measurements.

Contribution

It introduces a comprehensive analysis of quark charge screening, isospin breaking, and state mixing effects on baryon transition moments and decay widths, advancing theoretical understanding of baryon electromagnetic properties.

Findings

Modified quark charges due to screening affect baryon magnetic moments.

Calculated isospin mass splittings up to charmed baryons.

Predicted radiative decay widths incorporating state mixing effects.

Abstract

Motivated by the precision measurements of heavy flavor baryon masses, we analyze the modification of quark charge by employing the screening effect inside the baryon. In addition, we calculate the isospin mass splitting up to charmed baryons employing isospin symmetry breaking. Consequently, we obtain the masses, magnetic moments, and transition moments of $J^P=\frac{1}{2}^+$ and $\frac{3}{2}^+$ baryons to predict radiative decay widths for $\frac{1}{2}^{\prime +} \to \frac{1}{2}^+$ and $\frac{3}{2}^+\to \frac{1}{2}^{(\prime)+}$ transitions. Finally, we include the effects of state mixing in flavor degenerate baryon magnetic and transition moments, as well as M1 transition decay widths.