Chiral Analysis of Quenched Baryon Masses

Details Chiral Analysis of Quenched Baryon Masses Chiral Analysis of Quenched Baryon Masses

2002-05-16

arxiv.org/abs/hep-lat/0205017v1

Phys.Rev.D66:094507,2002

Physics

High Energy Physics

High Energy Physics - Lattice

23 pages, 6 figures

Scientific paper

10.1103/PhysRevD.66.094507

We extend to quenched QCD an earlier investigation of the chiral structure of the masses of the nucleon and the delta in lattice simulations of full QCD. Even after including the meson-loop self-energies which give rise to the leading and next-to-leading non-analytic behaviour (and hence the most rapid variation in the region of light quark mass), we find surprisingly little curvature in the quenched case. Replacing these meson-loop self-energies by the corresponding terms in full QCD yields a remarkable level of agreement with the results of the full QCD simulations. This comparison leads to a very good understanding of the origins of the mass splitting between these baryons.

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