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Positivity bounds on parton distributions at large Nc

P. V. Pobylitsa

hep-pharXiv:hep-ph/0203268

Abstract

Positivity bounds for twist-two parton distributions in multicolored QCD are stronger than their analogs at finite Nc. They include the enhanced large Nc version of Soffer inequality. These bounds are compatible with the DGLAP evolution to higher normalization points.

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