Conformally Soft Theorem in Gravity - Archive ouverte HAL
Article Dans Une Revue Journal of High Energy Physics Année : 2020

Conformally Soft Theorem in Gravity

Résumé

A central feature of scattering amplitudes in gravity or gauge theory is the existence of a variety of energetically soft theorems which put constraints on the amplitudes. Celestial amplitudes which are obtained from momentum-space amplitudes by a Mellin transform over the external particle energies cannot obey the usual energetically soft theorems. Instead, the symmetries of the celestial sphere imply that the scattering of conformally soft particles whose conformal weights under the 4D Lorentz group SL(2, ℂ) are taken to zero obey special relations. Such conformally soft theorems have recently been found for gauge theory. Here, I show conformally soft factorization of celestial amplitudes for gravity and identify it as the celestial analogue of Weinberg’s soft graviton theorem.

Dates et versions

hal-02153776 , version 1 (12-06-2019)

Identifiants

Citer

Andrea Puhm. Conformally Soft Theorem in Gravity. Journal of High Energy Physics, 2020, 09, pp.130. ⟨10.1007/JHEP09(2020)130⟩. ⟨hal-02153776⟩
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