We present first results of a systematic study of the structure of the low energy limit of the one-loop photon-graviton amplitudes induced by massive scalars and spinors. Our main objective is the search of KLT-type relations where effectively two photons merge into a graviton. We find such a relation at the graviton-photon-photon level. We also derive the diffeomorphism Ward identity for the 1PI one graviton - N photon amplitudes.
F. Bastianelli, O. Corradini, J.M. Davila, C. Schubert (2012). On the low energy limit of one loop photon-graviton amplitudes. PHYSICS LETTERS. SECTION B, 716, 345-359 [10.1016/j.physletb.2012.08.030].
On the low energy limit of one loop photon-graviton amplitudes
BASTIANELLI, FIORENZO;
2012
Abstract
We present first results of a systematic study of the structure of the low energy limit of the one-loop photon-graviton amplitudes induced by massive scalars and spinors. Our main objective is the search of KLT-type relations where effectively two photons merge into a graviton. We find such a relation at the graviton-photon-photon level. We also derive the diffeomorphism Ward identity for the 1PI one graviton - N photon amplitudes.File in questo prodotto:
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