Quenched spectroscopy with fixed-point and chirally improved fermions

Collaboration, BGR, Gattringer, Christof, Gockeler, Meinulf, Hasenfratz, Peter, Hauswirth, Simon, Holland, Kieran, Jorg, Thomas, Juge, Keisuke J, Lang, CB, Niedermayer, Ferenc
et al (show 3 more authors) (2003) Quenched spectroscopy with fixed-point and chirally improved fermions. Nucl.Phys.B, 677 (1-2). pp. 3-51.

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We present results from quenched spectroscopy calculations with the parametrized fixed-point and the chirally improved Dirac operators. Both these operators are approximate solutions of the Ginsparg-Wilson equation and have good chiral properties. This allows us to work at small quark masses and we explore pseudoscalar-mass to vector-mass ratios down to 0.28. We discuss meson and baryon masses, their scaling properties, finite volume effects and compare our results with recent large scale simulations. We find that the size of quenching artifacts of the masses is strongly correlated with their experimentally observed widths and that the gauge and hadronic scales are consistent.

Item Type: Article
Additional Information: 66 pages, 33 figures. Published version: minor modifications in the text, references added
Uncontrolled Keywords: hep-lat, hep-lat
Subjects: ?? QC ??
Divisions: Faculty of Science and Engineering > School of Physical Sciences > Mathematical Sciences
Depositing User: Symplectic Admin
Date Deposited: 04 Nov 2008 13:02
Last Modified: 17 Dec 2022 01:28
DOI: 10.1016/j.nuclphysb.2003.10.044
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/504