A Primary Study of Heavy Baryons Lambda_Q, Xi_Q, Sigma_Q and Omega_Q

TL;DR

This study calculates the masses of heavy baryons containing charm or bottom quarks using a chiral SU(3) quark model, showing general agreement with experimental data and providing predictions for unmeasured states.

Contribution

It applies the chiral SU(3) quark model with variational calculus to compute heavy baryon masses, offering new theoretical predictions and insights into internal interactions.

Findings

Calculated masses align with experimental data for most baryons.

Predicted masses for unobserved Omega_b and Xi_b^* baryons.

Identified slight discrepancies for Xi_Q baryons.

Abstract

We perform a preliminary study of the 1/2+ and 3/2+ ground-state baryons containing a heavy quark in the framework of the chiral SU(3) quark model. By using the calculus of variations, masses of Lambda_Q, Sigma_Q, Xi_Q, Omega_Q, Sigma_Q^*, Xi_Q^* and Omega_Q^*, where Q means c or b quark, are calculated. With taking reasonable model parameters, the numerical results of established heavy baryons are generally in agreement with the available experimental data, except that those of Xi_Q are somewhat heavier. For Omega_b with undetermined experimental mass and nobserved Xi_b^*, Omega_b^*, reasonable theoretical predictions are obtained. Interactions inside baryons are also discussed.