FLIC fermions and hadron phenomenology
Centre for the Subatomic Structure of Matter and Department of Physics and Mathematical Physics, University of Adelaide, SA 5005, Adelaide, Australia
2 Jefferson Lab, 12000 Jefferson Avenue, VA 23606, Newport News, USA
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A pedagogical overview of the formulation of the Fat-Link-Irrelevant-Clover (FLIC) fermion action and its associated phenomenology is described. The scaling analysis indicates FLIC fermions provide a new form of nonperturbative improvement where near-continuum results are obtained at finite lattice spacing. Spin-(1/2) and spin-(3/2), even- and odd-parity baryon resonances are investigated in quenched QCD, where the nature of the Roper resonance and are of particular interest. FLIC fermions allow efficient access to the light-quark-mass regime, where evidence of chiral nonanalytic behavior in the mass is observed.
© Società Italiana di Fisica and Springer-Verlag, 2003