Quenched QCD with fixed-point and chirally improved fermion

Abstract

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.

arXiv commentLattice2002(chiral), 17 pages, 21 figures, (LaTeX style file espcrc2.sty and AMS style files)

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Cited by in corpus (13)

• Chirally improving Wilson fermions - I. O(a) improvement
• Quenched spectroscopy with fixed-point and chirally improved fermions
• Excited hadrons on the lattice: Baryons
• Excited hadrons on the lattice: Mesons
• Spatially improved operators for excited hadrons on the lattice
• A lattice calculation of vector meson couplings to the vector and tensor currents using chirally improved fermions
• Kaon B Parameter in Quenched QCD
• Excited nucleons with chirally improved fermions
• Renormalization of bilinear quark operators for the chirally improved lattice Dirac operator
• Lattice calculation of low energy constants with Ginsparg-Wilson type fermions
• Absence of evidence for pentaquarks on the lattice
• Search for the Theta^+(1540) in lattice QCD
• Low energy constants from the chirally improved Dirac operator D_CI