Pomeron fan diagrams in perturbative QCD
Abstract
Within QCD reggeon field theory we study the formation of two subsequent triple pomeron vertices in the process P. We make use of an earlier investigation ~Bartels:1999aw of the six-reggeon amplitude in deep inelastic scattering and show that in the large-Nc limit pomeron fan diagrams emerge with the same triple pomeron vertex in all places. We thus confirm the BK-equation, but we also find additional terms related to the reggeization of the gluon, and we discuss their potential significance. Our analysis also includes the general pomeron two odderon vertex: a particular version of this vertex has been included into earlier generalizations the BK equation.
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