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QCD with one quark flavor: I. Numerical simulations and hadron spectrum
Presenter: Federico Farchioni — University of Muenster
F. Farchioni, I. Montvay, G. Muenster, E.E. Scholz, T. Sudmann, J. Wuilloud
One-flavor QCD – a gauge theory with SU(3) colour gauge group and a fermion in the fundamental representation – is studied by Monte Carlo simulations. The Symanzik tree-level-improved Wilson action is used for the gauge field and the (unimproved) Wilson action for the fermion. The theory is simulated by a polynomial hybrid Monte Carlo algorithm (PHMC). The mass spectrum of hadronic bound states is investigated at two different lattice spacings: a ≃ 0.37 r0 and a ≃ 0.27 r0, corresponding to ≃ 0.19 fm and ≃ 0.13 fm in ordinary QCD. The lattice extension is fixed to L ≃ 4.4 r0 (≃ 2.2 fm). The lightest simulated quark mass corresponds to a pion lighter than 300 MeV.
© 2006, University of Regensburg, Dept. of Physicscontact: lat07 at physik.uni-regensburg.de