Hadron spectrum, quark masses, and decay constants from light overlap fermions on large lattices
- School of Physics, University of Edinburgh, Edinburgh EH9 3JZ (United Kingdom)
- John von Neumann-Institut fuer Computing NIC, Deutsches Elektronen-Synchrotron DESY, D-15738 Zeuthen (Germany)
- Institut fuer Theoretische Physik, Universitaet Leipzig, D-04109 Leipzig (Germany)
- Theoretical Physics Division, Department of Mathematical Sciences, University of Liverpool, Liverpool L69 3BX (United Kingdom)
- Germany
- Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506 (United States)
We present results from a simulation of quenched overlap fermions with Luescher-Weisz gauge field action on lattices up to 24{sup 3}48 and for pion masses down to {approx_equal}250 MeV. Among the quantities we study are the pion, rho, and nucleon masses; the light and strange quark masses; and the pion decay constant. The renormalization of the scalar and axial vector currents is done nonperturbatively in the RI-MOM scheme. The simulations are performed at two different lattice spacings, a{approx_equal}0.1 fm and {approx_equal}0.15 fm, and on two different physical volumes, to test the scaling properties of our action and to study finite volume effects. We compare our results with the predictions of chiral perturbation theory and compute several of its low-energy constants. The pion mass is computed in sectors of fixed topology as well.
- OSTI ID:
- 21020252
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 75, Issue 7; Other Information: DOI: 10.1103/PhysRevD.75.073015; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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