Quenched QCD with fixed-point and chirally improved fermion
| Autor: | Thomas Jörg, C. B. Lang, Ferenc Niedermayer, Paul E.L. Rakow, Andreas Schäfer, Kieran Holland, Meinulf Göckeler, Christof Gattringer, Stefan Schaefer, K. J. Juge, S. Hauswirth, Peter Hasenfratz |
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| Jazyk: | angličtina |
| Rok vydání: | 2002 |
| Předmět: |
Physics
Quantum chromodynamics Nuclear and High Energy Physics Particle physics High Energy Physics::Lattice High Energy Physics - Lattice (hep-lat) Nuclear Theory High Energy Physics::Phenomenology FOS: Physical sciences Observable Scattering length Fermion Dirac operator Atomic and Molecular Physics and Optics symbols.namesake Pion High Energy Physics - Lattice Hadron spectroscopy symbols High Energy Physics::Experiment Pion decay constant Nuclear Experiment |
| Popis: | 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. Lattice2002(chiral), 17 pages, 21 figures, (LaTeX style file espcrc2.sty and AMS style files) |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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