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arxiv: 1707.06803 · v2 · submitted 2017-07-21 · ✦ hep-th · gr-qc

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Subleading Soft Theorem for Multiple Soft Gravitons

Subhroneel Chakrabarti , Sitender Pratap Kashyap , Biswajit Sahoo , Ashoke Sen , Mritunjay Verma
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classification ✦ hep-th gr-qc
keywords softarbitrarynumberamplitudesdimensionsexternalgravitonsnon-compact
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We derive the subleading soft graviton theorem in a generic quantum theory of gravity for arbitrary number of soft external gravitons and arbitrary number of finite energy external states carrying arbitrary mass and spin. Our results are valid to all orders in perturbation theory when the number of non-compact space-time dimensions is six or more, but only for tree amplitudes for five or less non-compact space-time dimensions due to enhanced contribution to loop amplitudes from the infrared region.

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  1. Subleading Chern-Simons soft factors in perturbative de Sitter

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    Subleading Chern-Simons soft factors stay insensitive to perturbative 1/ℓ² de Sitter corrections, indicating topological universality at the amplitude level.