Celestial double copy from the worldsheet
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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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2019 ◽
Vol 10
(4)
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pp. 954-960
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Keyword(s):
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2020 ◽
Vol 12
(1)
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pp. 129-137
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