Topological Charge and Fermions in the Two-Dimensional Lattice U(1) Model I: Staggered Fermions

摘要

Various definitions of topological charge within the compact QED2 model are examined. In particular, the authors study for staggered fermions the charge, Q bar = 1/2(Kappa sub p) x m Tr(Gamma sub 5)/(D + m) and its renormalization factor Kappa sub p.