Gauge-Invariant Double Copies via Recursion Relations.

We prove by construction that all tree-level amplitudes in pure (super)gravity can be expressed as termwise, gauge-invariant double copies of those of pure (super-)Yang-Mills obtained via on-shell recursion. These representations are far from unique: varying the recursive scheme leads to a wide variety of distinct but equally valid representations of gravitational amplitudes, all realized as double copies.

Citation

Jacob L Bourjaily, Nikhil Kalyanapuram, Kokkimidis Patatoukos, Michael Plesser, Yaqi Zhang. Gauge-Invariant Double Copies via Recursion Relations. Physical review letters. 2023 Nov 10;131(19):191601

PMID: 38000413

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