Sub-subleading soft gravitons: New symmetries of quantum gravity?

Abstract

Due to seminal works of Weinberg, Cachazo and Strominger we know that tree level quantum gravity amplitudes satisfy three factorization constraints. Building on previous works which relate two of these constraints to symmetries of quantum gravity at null infinity, we present rather strong evidence that the third constraint is also equivalent to a new set of symmetries of (perturbative) quantum gravity. Our analysis implies that the symmetry group of quantum gravity may be even richer than the BMS group (or infinite dimensional extension thereof) previously considered.

5 pages

References in corpus (5)

• Asymptotic symmetries and subleading soft graviton theorem
• Evidence for a New Soft Graviton Theorem
• Low's Subleading Soft Theorem as a Symmetry of QED
• Subleading soft photons and large gauge transformations
• Sub-subleading soft gravitons and large diffeomorphisms

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