QCD effective charges and the structure function F2 at small-x: Higher twist effects

We consider the effect of higher twist operators of the Wilson operator product expansion in the structure function F2(x,Q2) at small-x, taking into account QCD effective charges whose infrared behavior is constrained by a dynamical mass scale. The higher twist corrections are obtained from the reno...

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Bibliographic Details
Published inPhysics letters. B Vol. 804; p. 135350
Main Authors Hadjimichef, D., Luna, E.G.S., Peláez, M.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 10.05.2020
Elsevier
Subjects
Deep inelastic scattering
Higher twist operators
Nonperturbative QCD
Nonperturbative QCD
Deep inelastic scattering
Higher twist operators
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Summary:We consider the effect of higher twist operators of the Wilson operator product expansion in the structure function F2(x,Q2) at small-x, taking into account QCD effective charges whose infrared behavior is constrained by a dynamical mass scale. The higher twist corrections are obtained from the renormalon formalism. Our analysis is performed within the conventional framework of next-to-leading order, with the factorization and renormalization scales chosen to be Q2. The infrared properties of QCD are treated in the context of the generalized double-asymptotic-scaling approximation. We show that the corrections to F2 associated with twist-four and twist-six are both necessary and sufficient for a good description of the deep infrared experimental data.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2020.135350