Abstract
In this paper we evaluate the modified celestial amplitude for gravitons and gluons, as defined in [4]. 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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ArXiv ePrint: 1909.03075
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Open Access . This article is distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits any use, distribution and reproduction in any medium, provided the original author(s) and source are credited.
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Banerjee, S., Ghosh, S., Pandey, P. et al. Modified celestial amplitude in Einstein gravity. J. High Energ. Phys. 2020, 125 (2020). https://doi.org/10.1007/JHEP03(2020)125
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DOI: https://doi.org/10.1007/JHEP03(2020)125