MG12 - Talk detail |
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Participant |
Menotti, Pietro | |
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Institution |
Dipartimento di Fisica della Universita' di Pisa - Largo B. Pontecorvo 3 - Pisa - - Italy | |
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Session |
Talk |
Abstract |
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SQG5 |
Consistent gravitational anomalies for chiral scalars |
Starting from the Henneaux-Teitelboim action for a chiral scalar, which generalizes to curved space the Jackiw-Teitelboim action, we give two simple derivations of the exact consistent gravitational anomaly. The first derivation is through the Schwinger-DeWitt regularization. The second exploits cohomological methods and uses the fact that in dimension two the diffeomorphism transformations are described by a single ghost which allows to climb the cohomological chain in a unique way. |