Modified celestial amplitude in Einstein gravity
High Energy Physics - Theory
2020-04-22 v3
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.
Cite
@article{arxiv.1909.03075,
title = {Modified celestial amplitude in Einstein gravity},
author = {Shamik Banerjee and Sudip Ghosh and Pranjal Pandey and Arnab Priya Saha},
journal= {arXiv preprint arXiv:1909.03075},
year = {2020}
}
Comments
18 pages, Latex; reference added; typos corrected