Effective Yukawa Couplings in Noncompact Lattice QED

G. Schierholz; M. Goeckeler; P.E.L. Rakow; R. Horsley

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Effective Yukawa Couplings in Noncompact Lattice QED

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arxiv hep-lat/9503026 v1 pith:HG6FBX4O submitted 1995-03-30 hep-lat

M. Goeckeler , R. Horsley , P.E.L. Rakow , G. Schierholz This is my paper

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keywords couplingsyukawacouplingeffectivefermionslatticenoncompactbehaviour

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We investigate effective Yukawa couplings of mesons to the elementary fermions in noncompact lattice QED. The couplings are extracted from suitable fermion-antifermion-meson three-point functions calculated by Monte Carlo simulations with dynamical staggered fermions. The scaling behaviour is compatible with expectations from perturbation theory, thus indicating triviality of QED. The lines of constant Yukawa coupling are compared to flows of other quantities. Consistency is seen, at most, for weak coupling.

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