We study the properties of baryons consisting of three heavy quarks (“triply heavy baryons”) in the vacuum and in a hot QCD medium, which is created in relativistic heavy-ion collisions. Masses and wave functions of ${\mathrm{\Omega }}_{ccc}, {\mathrm{\Omega }}_{ccb}, {\mathrm{\Omega }}_{bbc}$, and ${\mathrm{\Omega }}_{bbb}$ up to the second radial excited states are obtained by solving the three-body Schrödinger equation with the hyperspherical harmonics method. With parameters completely fixed by fitting quarkonium bound states in vacuum, we predicted the masses for $1S, 2S$, and $3S$ states of triply heavy baryons. We also computed the temperature dependence of baryon masses and the thermal widths in a hot QCD medium. These properties are important for the precise study of triply heavy baryon production in heavy ion collisions.

• Received 15 November 2023
• Accepted 16 January 2024

DOI:https://doi.org/10.1103/PhysRevC.109.024901