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High energy amplitude as an admixture of "soft" and "hard" Pomerons

Sergey Bondarenko, Eugene Levin, C-I Tan

hep-pharXiv:hep-ph/0306231

Abstract

In this paper an attempt is made to find an interface of the perturbative BFKL Pomeron with the non-perturbative Pomeron originating from non-perturbative QCD phenomena such as QCD instantons and/or scale anomaly. The main idea is that the non-perturbative Pomeron involves a large scale (M0 ≈ 2 GeV ), which is larger than the scale from which perturbative QCD is applicable. One key result is that even for processes involving a large hard scale (such as DIS) the low x behavior is determined by an effective Pomeron with an intercept having an essential non-perturbative QCD contribution.

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