Probing the Perturbative NLO Parton Evolution in the Small-$x$ Region

Details Probing the Perturbative NLO Parton Evolution in the Small-$x$ Region Probing the Perturbative NLO Parton Evolution in the Small-$x$ Region

2004-12-03

arxiv.org/abs/hep-ph/0412049v2

Eur.Phys.J.C40:515-517,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revised version, to appear in EPJC

Scientific paper

10.1140/epjc/s2005-02167-3

A dedicated test of the perturbative QCD NLO parton evolution in the very small-$x$ region is performed. We find a good agreement with recent precision HERA-data for $F_2^p(x,Q^2)$, as well as with the present determination of the curvature of $F_2^p$. Characteristically, perturbative QCD evolutions result in a positive curvature which increases as $x$ decreases. Future precision measurements in the very small $x$-region, $x<10^{-4}$, could provide a sensitive test of the range of validity of perturbative QCD

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