Gravitational and Schwinger model anomalies: how far can the analogy go?

Abstract

We describe the most general treatment of all anomalies both for chiral and massless Dirac fermions, in two-dimensional gravity. It is shown that for this purpose two regularization dependent parameters are present in the effective action. Analogy to the \sc\ model is displayed corresponding to a specific choice of the second parameter, thus showing that the gravitational model contains \a\ relations having no analogy in the \sc\ model.

16 pages, no figure, phyzzx macro, square.tex has been deleted from the previous version

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