A unity of QCD evolution dynamics at small $x$ region

Details A unity of QCD evolution dynamics at small $x$ region A unity of QCD evolution dynamics at small $x$ region

2004-08-30

arxiv.org/abs/hep-ph/0408327v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

43 pages, 21 figures, profoundly revised

Scientific paper

The DGLAP, BFKL, modified DGLAP and modified BFKL equations are constructed in a unified partonic framework. The antishadowing effect in the recombination process is emphasized, which leads to two different small $x$ behaviors of gluon distribution. In the meantime, the BFKL equation and modified DGLAP equation are viewed as the corrections of the initial gluon correlations to the evolution dynamics at twist-2 and twist-4, respectively. A partonic explanation of Regge theory for the BFKL dynamics and the relation of the BFKL dynamics with the helicity configuration of the initial gluons are presented.

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