Work

Exploring the Ω − spectrum in lattice QCD

Year: 2025

Type: article

Abstract: We present an exploratory lattice QCD analysis of the Ω-baryon spectrum. Using a basis of only local smeared three-quark operators in a correlation matrix analysis, we report masses for the ground, first and second excited states of the J P = 1/2±, 3/2± spectra across a broad range in the light quark mass. We investigate the parity and spin quantum numbers for the states observed on the lattice, looking to reconcile these with the resonances encountered in experiment. We find that the Ω−(2012) as reported by the Particle Data Group corresponds to two overlapping resonances with J P = 1/2− and 3/2−. We also propose quantum number assignments for the higher energy resonances, and identify successive radial excitations within the spectra.

Source: Journal of Physics G Nuclear and Particle Physics

DOI: 10.1088/1361-6471/add551

Authors: Liam Hockley, Waseem Kamleh, Derek Leinweber, Anthony Thomas

Institution: The University of Adelaide

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $3,325

Funders: Australian Government, Australian Research Council