Quenched QCD with fixed-point and chirally improved fermion

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 obse...

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Bibliographic Details
Published in:arXiv.org 2002-09
Main Authors: Gattringer, Christof, Göckeler, Meinulf, Hasenfratz, Peter, Hauswirth, Simon, Holland, Kieran, Thomas, Jörg, Juge, K J, Lang, C B, Niedermayer, Ferenc, Rakow, P E L, Schaefer, Stefan, Schäfer, Andreas, collaboration
Format: Article
Language:English
Subjects:
Chirality
Computer simulation
Fermions
Fixed points (mathematics)
Operators
Quenching
Online Access:Get full text
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.0209099