Perturbative QCD and Regge theory: closing the circle

Details Perturbative QCD and Regge theory: closing the circle Perturbative QCD and Regge theory: closing the circle

2001-11-29

arxiv.org/abs/hep-ph/0111427v3

Phys.Lett. B533 (2002) 277-284

Physics

High Energy Physics

High Energy Physics - Phenomenology

8 pages, plain tex, with 6 figures embedded using epsf. Revised version contains extra explanation and corrects typos

Scientific paper

10.1016/S0370-2693(02)01556-3

We explain how Regge theory and perturbative evolution may be made compatible at small x. The result not only gives striking support to the two-pomeron description of small-x behaviour, but gives a rather clean test of perturbative QCD itself. When x is very small, or Q^2 is very large, the proton's gluon distribution function is significantly larger than is commonly believed. Perturbative evolution is invalid below Q^2\approx 5 GeV^2.

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