Descendants in celestial CFT and emergent multi-collinear factorization

Understand

Multi-collinear factorization limits provide a window to study how locality and unitarity of scattering amplitudes can emerge dynamically from celestial CFT, the conjectured holographic dual to gauge and gravitational theories in flat space.

• To this end, we first use asymptotic symmetries to commence a systematic study of conformal and Kac-Moody descendants in the OPE of celestial gluons.
• Recursive application of these OPEs then equips us with a novel holographic method of computing the multi-collinear limits of gluon amplitudes.
• We perform this computation for some of the simplest helicity assignments of the collinear particles.