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High energy amplitude as an admixture of ‘soft’ and ‘hard’ Pomerons. (English) Zbl 1038.81523

Summary: In this paper an attempt is made to find an interface of the perturbative BFKL pomeron with the nonperturbative 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 (\(M_0\approx 2 \text{GeV}\)), 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 nonperturbative QCD contribution.

MSC:

81V05 Strong interaction, including quantum chromodynamics
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