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arXiv · 2402.18798

Multiparticle Contributions to the Celestial OPE

Alfredo Guevara·Yangrui Hu·Sabrina Pasterski
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Abstract

We start by defining two-particle operators that appear in celestial CFT. We then show how to compute their OPE coefficients with the known single-particle operators at tree level from multiparticle factorization channels, focusing on the leading contribution involving the two-particle states. These factorization channels only give us single-particle exchanges. To extract the multiparticle exchanges, we look at the $\overline{\rm MHV}$ gluon amplitudes and show how non-factorization channels contribute to two-particle terms in the single-helicity sector. This is a first step towards systematically computing the full celestial OPE.

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Alfredo Guevara, Yangrui Hu, Sabrina Pasterski. 2024-02-29. Multiparticle Contributions to the Celestial OPE. https://doi.org/10.1007/jhep07(2025)178

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