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 $\kappa =0.25$ at large $\beta$. Finite size scaling analysis on lattices 8^2, 12^2, 16^2, 20^2 and 24^2 indicates a continuos transition. The hyperscaling relation is verified in the explored $\beta$ region.

### The Schwinger model with Wilson fermions in the MFA approach.

#### Abstract

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 $\kappa =0.25$ at large $\beta$. Finite size scaling analysis on lattices 8^2, 12^2, 16^2, 20^2 and 24^2 indicates a continuos transition. The hyperscaling relation is verified in the explored $\beta$ region.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11697/15517
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