How Pomerons Meet in Coloured Glass

Abstract

We compute the perturbative one-to-three Pomeron vertex in the colour glass condensate using the extended generalized leading logarithmic approximation in high energy QCD. The vertex is shown to be a conformal four-point function in two-dimensional impact parameter space. Our result can be used to compare different theoretical descriptions of the colour glass condensate.

Comments: 32 pages; v2: typos corrected, discussion extended, acknowledgement added