EPP Theory Seminar
Universality of five-point QCD amplitudes at high energy
by
→
America/Los_Angeles
48/2-224 - Madrone (SLAC)
48/2-224 - Madrone
SLAC
28
Description
In this talk, I will discuss the structure of five-point QCD amplitudes in the high energy regime, often called Regge limit. In particular, I will delve into the factorization properties of the amplitudes at next-to-next-to-leading logarithmic accuracy. At this level of accuracy, non-factorized terms arise due to multi-reggeon exchanges. We compute these terms by means of the shockwave formalism and the Balitsky/JIMWLK equation and we expand the exact two-loop five-point amplitude in the high energy limit. We are then able to extract the two-loop central emission vertex in QCD for the first time. This ingredient plays a major role in extending the BFKL resummation to NNLL accuracy.