Schwinger terms in Weyl-invariant and diffeomorphism-invariant 2-d scalar field theory
Christoph Adam, Gerardo L. Rossini
Abstract
We compute the Schwinger terms in the energy-momentum tensor commutator algebra from the anomalies present in Weyl-invariant and diffeomorphism-invariant effective actions for two dimensional massless scalar fields in a gravitational background. We find that the Schwinger terms are not sensitive to the regularization procedure and that they are independent of the background metric.
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