Triply heavy baryon spectroscopy revisited

TL;DR

This study offers a detailed nonrelativistic quark model analysis of triply heavy baryons, calculating their mass spectra, decay widths, and correcting previous misconceptions, thus aiding future experimental and theoretical research.

Contribution

It provides the most comprehensive nonrelativistic quark model analysis of triply heavy baryons, including full angular momentum mixing and corrections to prior misconceptions.

Findings

Good agreement with lattice QCD for low-lying states

Lower masses for excited states compared to lattice results

Significant differences in radiative decay widths from previous models

Abstract

We present a comprehensive study of triply heavy baryons ($\Omega_{ccc}$, $\Omega_{bbb}$, $\Omega_{bcc}$, and $\Omega_{bbc}$) within the nonrelativistic quark model, employing the Gaussian expansion method to calculate mass spectra up to $D$-wave states. Our analysis represents the most complete treatment to date for this model, incorporating full angular momentum mixing effects. While our predictions for low-lying states agree well with lattice quantum chromodynamics (QCD) results, we find systematically lower masses for excited states compared to lattice calculations. Using the obtained wave functions, we estimate radiative decay widths up to $1D$ states, revealing significant differences from previous theoretical work. Additionally, we identify and resolve several misconceptions in prior treatments of triply heavy baryon spectroscopy, particularly symmetry constraint and wave function construction in three-quark systems. These results provide crucial information for future experimental searches and theoretical investigations of triply heavy baryon systems.