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We investigate a lattice version of QED with four flavors by numerical simulations. For the renormalized charge (eₑ) and mass we find results which are consistent with eₑ vanishing in the continuum limit. A detailed study of the relation between bare and renormalized quantities reveals that the Landau pole lies in a region of parameter space which is made inaccessible by spontaneous chiral symmetry breaking.
Göckeler et al. (Mon,) studied this question.
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