Systematic analysis of the mass spectra of triply heavy baryons

TL;DR

This paper systematically analyzes the mass spectra, radii, and density distributions of triply heavy baryons using a relativized quark model, revealing mode dominance and configuration effects, and constructs Regge trajectories for these particles.

Contribution

It provides the first comprehensive analysis of triply heavy baryon spectra, including excited states and mode dominance, with implications for understanding their structure and Regge trajectories.

Findings

Excited energies are linked to heavier quarks.

Lowest $ ext{Ω}_{ccb}$ state is $ ext{λ}$-mode dominated.

Configuration mixing lowers the ground state energy.

Abstract

The mass spectra, root mean square (r.m.s.) radii and radial density distributions of $\Omega_{ccb}$ and $\Omega_{bbc}$ baryons are firstly analyzed in the present work. The calculations are carried out in the frame work of relativized quark model, where the baryon is regarded as a real three-quark system. Our results show that the excited energy of charmed-bottom triply baryons are always associated with heavier quark. This means the lowest state of $\Omega_{ccb}$ baryon is dominated by the $\lambda$-mode, however, the dominant orbital excitation for $\Omega_{bbc}$ baryon is $\rho$-mode. In addition, the influence of configuration mixing on mass spectrum, which is induced by different angular momentum assignments, is also analyzed. It shows that energy of the lowest state will be further lowered by this mixing effect. According to this conclusion, we systematically analyze the mass spectra of the ground and excited states($1S\sim4S$, $1P\sim4P$, $1D\sim4D$, $1F\sim4F$ and $1G\sim4G$) of $\Omega_{ccb}$, $\Omega_{bbc}$, $\Omega_{ccc}$ and $\Omega_{bbb}$ baryons. Finally, with the predicated mass spectra, the Regge trajectories of these heavy baryons in the ($J$,$M^{2}$) plane are constructed.