Talk presented by Ralph Kenna

Parallel Session: Higgs, Yukawa, SUSY

Friday July 2nd, 17.00 - 17.20, Room 6

The Phase Diagram of the Schwinger Model with Wilson Fermions

Abstract: A new method to analytically determine the partition function zeros of weakly coupled gauge theories on finite--size lattices is developed. Applied to the lattice Schwinger model, this reveals the absence of a phase transition at fixed weak coupling. We show how finite--size scaling techniques on small or moderate lattice sizes may mimic the presence of a spurious phase transition.

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