Analysis demonstrates a continuous transition in the Schwinger model, indicating critical behaviour in the lattice setting.
We present a detailed analysis, in the framework of the MFA approach, of the critical behaviour of the lattice Schwinger model with Wilson fermions on lattices up to 24^2, through the study of the Lee-Yang zeros and the specific heat. We find compelling evidence for a critical line ending at k = 0,25 at large β. Finite size scalintg analysis on lattices 8^2, 12^2, 16^2, 20^2 and 24^2 indicates a continuous transition. The hyperscaling relation is verified in the explored β region.
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V. et al. (1995) studied this question.
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