Chiral corrections to the axial charges of the octet baryons from quenched QCD

Details Chiral corrections to the axial charges of the octet baryons from quenched QCD Chiral corrections to the axial charges of the octet baryons from quenched QCD

1996-08-16

arxiv.org/abs/hep-lat/9608091v1

Phys.Rev. D58 (1998) 074509

Physics

High Energy Physics

High Energy Physics - Lattice

standard LaTeX, 16 pages, 4 epsf figures

Scientific paper

10.1103/PhysRevD.58.074509

We calculate one-loop correction to the axial charges of the octet baryons using quenched chiral perturbation theory, in order to understand chiral behavior of the axial charges in quenched approximation to quantum chromodynamics (QCD). In contrast to regular behavior of the full QCD chiral perturbation theory result, $c_0+c_{l2}m_\pi^2\,\ln{m_\pi^2}+\cdots$, we find that the quenched chiral perturbation theory result, $c_0^Q+(c_{l0}^Q+c_{l2}^Qm_\pi^2)\ln{m_\pi^2}+c_2^Q m_\pi^2+\cdots$, is singular in the chiral limit.

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