Prediction of the Omega_bbb mass from lattice QCD

TL;DR

This paper presents a lattice QCD calculation of the Omega_bbb baryon mass, providing a precise theoretical prediction that includes systematic and statistical uncertainties, and also computes the hyperfine splitting.

Contribution

The study offers the first lattice QCD determination of the Omega_bbb mass with detailed error analysis and hyperfine splitting calculation, using multiple gauge ensembles and improved NRQCD.

Findings

Omega_bbb mass = 14.371 GeV with uncertainties

Hyperfine splitting between J=3/2 and J=1/2 states calculated

Results consistent with theoretical expectations

Abstract

The mass of the triply heavy baryon Omega_bbb is calculated in lattice QCD with 2+1 flavors of light sea quarks. The b quark is implemented with improved lattice NRQCD. Gauge field ensembles from both the RBC/UKQCD and MILC collaborations with lattice spacings in the range from 0.08 fm to 0.12 fm are used. The final result for the Omega_bbb mass, which includes an electrostatic correction, is 14.371+-0.004(stat)+-0.011(syst)+-0.001(exp) GeV. The hyperfine splitting between the physical J=3/2 state and a fictitious J=1/2 state is also calculated.