Celestial double copy from the worldsheet

Abstract

Using the ambitwistor string, we compute tree-level celestial amplitudes for biadjoint scalars, Yang-Mills and gravity to all multiplicities. They are presented in compact CHY-like formulas with operator-valued scattering equations and numerators acting on a generalized hypergeometric function. With these we extend the celestial double copy to tree-level amplitudes with arbitrary number of external states. We also show how color-kinematics duality is implemented in celestial amplitudes and its interpretation in terms of a generalized twisted cohomology theory.

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Cited by in corpus (19)

• Holographic Symmetry Algebras for Gauge Theory and Gravity
• Celestial Amplitudes from UV to IR
• The SAGEX Review on Scattering Amplitudes, Chapter 11: Soft Theorems and Celestial Amplitudes
• Classical double copy at null infinity
• Celestial operator products from the worldsheet
• Celestial chiral algebras, colour-kinematics duality and integrability
• Ambidextrous light transforms for celestial amplitudes
• Asymptotic Weyl Double Copy
• From Moyal deformations to chiral higher-spin theories and to celestial algebras
• Celestial Dual Superconformal Symmetry, MHV Amplitudes and Differential Equations
• The structure of IR divergences in celestial gluon amplitudes
• Radiative phase space extensions at all orders in r for self-dual Yang-Mills and Gravity
• On Chiral Splitting and the Ambitwistor String
• The Holographic Soft $S$-Matrix in QED and Gravity
• One-loop multicollinear limits from 2-point amplitudes on self-dual backgrounds
• Zwanziger's pairwise little group on the celestial sphere
• Gauge and Gravity Amplitudes on the Celestial Sphere
• $p$-Forms on the Celestial Sphere
• The Weyl double copy from twistor space