Pomeron loops in zero transverse dimensions
Abstract
We analyze a toy model which has a structure similar to that of the recently found QCD evolution equations, but without transverse dimensions. We develop two different but equivalent methods in order to compute the leading-order and next-to-leading order Pomeron loop diagrams. In addition to the leading-order result which has been derived from Mueller's toy model~% Mueller:1994gb, we can also calculate the next-to-leading order contribution which provides the (αs2α Y) correction. We interpret this result and discuss its possible implications for the four-dimensional QCD evolution.
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