Quenched QCD with fixed-point and chirally improved fermion

Details Quenched QCD with fixed-point and chirally improved fermion Quenched QCD with fixed-point and chirally improved fermion

2002-09-10

arxiv.org/abs/hep-lat/0209099v1

Nucl.Phys.Proc.Suppl.119:796-812,2003

Physics

High Energy Physics

High Energy Physics - Lattice

Lattice2002(chiral), 17 pages, 21 figures, (LaTeX style file espcrc2.sty and AMS style files)

Scientific paper

10.1016/S0920-5632(03)01687-6

In this contribution we present results from quenched QCD simulations with the parameterized fixed-point (FP) and the chirally improved (CI) Dirac operator. Both these operators are approximate solutions of the Ginsparg-Wilson equation and have good chiral properties. We focus our discussion on observables sensitive to chirality. In particular we explore pion masses down to 210 MeV in light hadron spectroscopy, quenched chiral logs, the pion decay constant and the pion scattering length. We discuss finite volume effects, scaling properties of the FP and CI operators and performance issues in their numerical implementation.

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