Precisely determining the ground state mass of Spin-3/2 $\Omega_{ccc}$ baryon from Lattice QCD

TL;DR

This paper provides the most precise lattice QCD calculations to date of the ground-state masses of triply charmed baryons with spin-3/2, including systematic uncertainties and continuum extrapolation.

Contribution

It introduces a highly accurate lattice QCD method for determining triply charmed baryon masses, addressing systematic uncertainties and using multiple valence charm actions.

Findings

Mass of spin-3/2 $\Omega_{ccc}$ (3/2+): 4793(5)(+11-8) MeV

Mass of spin-3/2 $\Omega_{ccc}$ (3/2-): 5094(12)(+19-17) MeV

First precise lattice QCD prediction for these baryons

Abstract

We present the most precise determination to date of the ground-state masses of the triply charmed baryons with both parities, obtained by continuum extrapolation and fully addressing the systematic uncertainties. The calculations are performed on six $N_f=2+1+1$ HISQ ensembles, generated by the MILC collaboration, with two complementary setups for the valence charm action, one using the HISQ action and the other using the overlap fermion action. Our prediction for the mass of the lowest two triply charmed spin-3/2 baryons are: $M_{\Omega_{ccc}} (3/2^{+}) = 4793 (5) \left(^{+11}_{-8}\right)$ MeV, and $M_{\Omega_{ccc}} (3/2^{-}) = 5094 (12) \left(^{+19}_{-17}\right)$ MeV.