SU(3)-flavour breaking in octet baryon masses and axial couplings
Manuel E. Carrillo-Serrano, Ian C. Clo\"et, Anthony W. Thomas
TL;DR
This paper investigates SU(3) flavor symmetry breaking effects in octet baryon masses and axial couplings using a covariant NJL model, revealing up to 10% symmetry violation due to strange quarks.
Contribution
It introduces a relativistic Faddeev equation approach with scalar and axialvector diquarks to compute baryon properties, highlighting SU(3) symmetry breaking effects.
Findings
Up to 10% SU(3) symmetry violation in axial charges.
Masses and axial couplings calculated within a covariant NJL model.
Relativistic Faddeev equations effectively describe octet baryon properties.
Abstract
The lightest baryon octet is studied within a covariant and confining Nambu--Jona-Lasinio model. By solving the relativistic Faddeev equations including scalar and axialvector diquarks, we determine the masses and axial charges for \Delta S = 0 transitions. For the latter the degree of violation of SU(3) symmetry arising because of the strange spectator quark(s) is found to be up to 10%.
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