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

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.

Comments: 43 pages, to appear in Phys. Rev. D