Celestial holography meets twisted holography: 4d amplitudes from chiral correlators

  title={Celestial holography meets twisted holography: 4d amplitudes from chiral correlators},
  author={Kevin J. Costello and Natalie M. Paquette},
  journal={Journal of High Energy Physics},
We propose a new program for computing a certain integrand of scattering amplitudes of four-dimensional gauge theories which we call the form factor integrand, starting from 6d holomorphic theories on twistor space. We show that the form factor integrands can be expressed as sums of products of 1.) correlators of a 2d chiral algebra, related to the algebra of asymptotic symmetries uncovered recently in the celestial holography program, and 2.) OPE coefficients of a 4d non-unitary CFT. We prove… 

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