Nuclear Physics Seminar
On the anomalous dimensions of the multiple pomeron exchanges
Bo-Wen Xiao (Columbia U.)
High energy hard scattering in large $N_{c}$ limit can be
described by the QCD dipole model. In this seminar, I will first give
a brief introduction to BFKL Pomeron, and Mueller's dipole model as
well as Kovchegov equation. Then, their applications in phenomenology
also will be discussed. Later, I would like to focus on my recent
work on the anomalous dimensions of the multiple Pomeron exchanges. In
this work, single, double and triple BFKL pomeron exchange amplitudes
are computed explicitly within the dipole model. Based on the
calculation, a general formula which governs the anomalous dimension
of the k-Pomeron exchanges amplitude in dipole-nucleus scattering is
conjectured. As far as the unitarity problem is concerned, we find
that the anomalous dimension varies from graph to graph due to the
DGLAP evolution. In the end, a comparison between this computation and
reggeon field theory is provided.
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