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

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

2003-06-24

arxiv.org/abs/hep-ph/0306231v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

29 pages, 13 fugures. Accepted for publication in Nucl. Phys. A

Scientific paper

10.1016/j.nuclphysa.2003.11.056

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 ($M_0 \approx 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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