Exact tree-level MHV graviton scattering amplitudes at arbitrary multiplicity are obtained on self-dual Taub-NUT backgrounds using twistor theory, including spin via Newman-Janis shift, with undeformed celestial symmetries.
Jiang,Holographic Chiral Algebra: Supersymmetry, Infinite Ward Identities, and EFTs
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The chiral algebra bootstrap yields all-loop splitting functions for self-dual N=4 SYM, a proof of no double-pole OPEs, and novel two-loop form factors with anti-self-dual field strength insertions.
Modular-flow generators for celestial CFT and Klein CFT are obtained as linear combinations of global SL(2,C)/SO(2,2) and supertranslation generators that preserve interval endpoints.
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Graviton scattering on self-dual black holes
Exact tree-level MHV graviton scattering amplitudes at arbitrary multiplicity are obtained on self-dual Taub-NUT backgrounds using twistor theory, including spin via Newman-Janis shift, with undeformed celestial symmetries.
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Form factors of $\mathscr{N}=4$ self-dual Yang-Mills from the chiral algebra bootstrap
The chiral algebra bootstrap yields all-loop splitting functions for self-dual N=4 SYM, a proof of no double-pole OPEs, and novel two-loop form factors with anti-self-dual field strength insertions.
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Modular Flow of Celestial Conformal Field Theory
Modular-flow generators for celestial CFT and Klein CFT are obtained as linear combinations of global SL(2,C)/SO(2,2) and supertranslation generators that preserve interval endpoints.