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arXiv · 1909.03075

Modified celestial amplitude in Einstein gravity

Shamik Banerjee·Sudip Ghosh·Pranjal Pandey·Arnab Priya Saha
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Abstract

In this paper we evaluate the modified celestial amplitude for gravitons and gluons, as defined in arXiv:1801.10171[hep-th]. We find that the modified (tree) amplitude is finite for gravitons in Einstein gravity. The modified amplitude behaves like correlation function of operators inserted at various points of null-infinity in the Minkowski space-time. Therefore, unlike the standard celestial amplitudes, these are three dimensional objects. We also show that this amplitude admits conformal soft factorization recently studied in the literature.

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Shamik Banerjee, Sudip Ghosh, Pranjal Pandey, Arnab Priya Saha. 2019-09-06. Modified celestial amplitude in Einstein gravity. https://doi.org/10.1007/jhep03(2020)125

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