Strong decay widths of S- and P-wave singly-, doubly- and triply-heavy charm and bottom baryons

TL;DR

This paper calculates the decay widths of various heavy baryons into lighter baryons and mesons using a non-relativistic quark model, providing theoretical predictions that align reasonably with experimental data.

Contribution

It offers a comprehensive analysis of decay widths for S- and P-wave heavy baryons with charm and bottom quarks, including flavor, spin, and orbital effects, and compares results with experimental data.

Findings

Singly-heavy baryon widths agree with experiments

Doubly-heavy baryon widths are suppressed by quark mass ratios

Selection rules identify forbidden decays

Abstract

We present a study of two-body decay widths of heavy baryons into another heavy baryon and a light pseudoscalar meson in the framework of the non-relativistic quark model in combination with the elementary emission model for the strong couplings. The present study includes the decays of 1S- and 1P-wave baryons with one, two or three heavy quarks, either charm (c) or bottom (b). The relative partial widths are given by the appropriate flavor SU(3) isoscalar factors. The flavor, spin and orbital contributions are discussed explicitly as well as selection rules for forbidden decays. The total widths are compared with the available experimental data as well as with other theoretical studies. The calculated widths of singly-heavy baryons are found to be in reasonable agreement with the observed widths. The decay widths of doubly-heavy baryons are suppressed with respect to those of the singly-heavy baryons by the ratios of the quark masses appearing in the orbital contributions.