Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-08-26
Nucl.Phys. B563 (1999) 437-447
Physics
High Energy Physics
High Energy Physics - Theory
14 pages, Latex. Some numerical errors have been corrected
Scientific paper
10.1016/S0550-3213(99)00547-7
We investigate a class of models in 1+1 dimensions with four fermion interaction term. At each order of the perturbation expansion, the models are ultraviolet finite and Lorentz non-invariant. We show that for certain privileged values of the coupling constants, Lorentz symmetry is restored, and indeed the model turns out to be conformally invariant. This phenomenon is both quantum mechanical and non-perturbative.
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