QCD effective charges and the structure function F2 at small-x: Higher twist effects
| Autor: | Marcela Peláez, E. G. S. Luna, Dimiter Hadjimichef |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
High Energy Physics - Theory
Nuclear and High Energy Physics Higher twist operators Gluons High Energy Physics::Lattice Cromodinâmica quântica FOS: Physical sciences Renormalon High Energy Physics - Experiment Renormalization High Energy Physics - Experiment (hep-ex) High Energy Physics - Phenomenology (hep-ph) High Energy Physics - Lattice Factorization Operator product expansion Twist Nonperturbative QCD Mathematical physics Quantum chromodynamics Physics High Energy Physics - Lattice (hep-lat) Espalhamento inelastico profundo Deep inelastic scattering lcsh:QC1-999 Gluon High Energy Physics - Phenomenology High Energy Physics - Theory (hep-th) lcsh:Physics |
| Zdroj: | Physics Letters B, Vol 804, Iss, Pp-(2020) Repositório Institucional da UFRGS Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
| ISSN: | 0370-2693 |
| Popis: | We consider the effect of higher twist operators of the Wilson operator product expansion in the structure function $F_{2}(x,Q^{2})$ 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 $Q^{2}$. The infrared properties of QCD are treated in the context of the generalized double-asymptotic-scaling approximation. We show that the corrections to $F_{2}$ associated with twist-four and twist-six are both necessary and sufficient for a good description of the deep infrared experimental data. 19 pages, 6 figures, text improved, references added, gluon distribution function calculated. To be published in Phys. Lett. B |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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