CHIRAL-SYMMETRY IN THE 2-FLAVOR LATTICE SCHWINGER MODEL

We study the 2-flavour lattice Schwinger model: QED in D = 2 with two fermion species of identical mass. In the simulation we are using Wils on fermions where chiral symmetry is explicitly broken. Since there is no known simple order parameter it is non-trivial to identify the cri tical line of the chiral phase transition. We therefore need to find o bservables which allow an identification of a possible restoration of chiral symmetry. We utilize the PCAC-relations in order to identify th e critical coupling, where chiral symmetry is restored.