Heavy Baryons in a Quark Model

TL;DR

This paper applies a quark model to predict heavy baryon spectra, achieving good agreement with known masses but highlighting discrepancies for certain doubly-charmed baryons and analyzing state mixing and symmetry multiplets.

Contribution

It provides new predictions for heavy baryon masses, examines mixing effects between states, and explores heavy-quark spin-symmetry multiplets within a quark model framework.

Findings

Model agrees with experimental heavy baryon masses

Small mixing between Cascade_Q and Cascade_Q' states

Large mixing between Cascade_bc and Cascade_bc' states

Abstract

A quark model is applied to the spectrum of baryons containing heavy quarks. The model gives masses for the known heavy baryons that are in agreement with experiment, but for the doubly-charmed baryon Cascade_{cc}, the model prediction is too heavy. Mixing between the Cascade_Q and Cascade_Q^\prime states is examined and is found to be small for the lowest lying states. In contrast with this, mixing between the Cascade_{bc} and Cascade_{bc}^\prime states is found to be large, and the implication of this mixing for properties of these states is briefly discussed. We also examine heavy-quark spin-symmetry multiplets, and find that many states in the model can be placed in such multiplets. We compare our predictions with those of a number of other authors.