Anomalous evolution of nonsinglet structure functions

We review a formalism that includes the effects of nonperturbative U(1) symmetry breaking on the QCD evolution of nonsinglet structure functions. We show that a strong scale dependence is generated in an intermediate energy range 0.5 \lsim Q^2 \lsim 5~GeV^2 for all values of x. We show that this exp...

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Detalles Bibliográficos
Autores principales: Forte, Stefano, Ball, Richard D.
Lenguaje:eng
Publicado: 1994
Materias:
Particle Physics - Phenomenology
Acceso en línea:https://dx.doi.org/10.1016/0920-5632(95)00037-A
http://cds.cern.ch/record/268183
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author Forte, Stefano
Ball, Richard D.
author_facet Forte, Stefano
Ball, Richard D.
author_sort Forte, Stefano
collection CERN
description We review a formalism that includes the effects of nonperturbative U(1) symmetry breaking on the QCD evolution of nonsinglet structure functions. We show that a strong scale dependence is generated in an intermediate energy range 0.5 \lsim Q^2 \lsim 5~GeV^2 for all values of x. We show that this explains naturally the observed violation of the Gottfried sum, and allows a determination of the shape of the nonsinglet structure function, in excellent agreement with experiment. We argue that these effects may affect the determination of \alpha_s from deep-inelastic scattering.
id cern-268183
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1994
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spelling cern-2681832023-03-14T20:44:58Zdoi:10.1016/0920-5632(95)00037-Ahttp://cds.cern.ch/record/268183engForte, StefanoBall, Richard D.Anomalous evolution of nonsinglet structure functionsParticle Physics - PhenomenologyParticle Physics - PhenomenologyWe review a formalism that includes the effects of nonperturbative U(1) symmetry breaking on the QCD evolution of nonsinglet structure functions. We show that a strong scale dependence is generated in an intermediate energy range 0.5 \lsim Q^2 \lsim 5~GeV^2 for all values of x. We show that this explains naturally the observed violation of the Gottfried sum, and allows a determination of the shape of the nonsinglet structure function, in excellent agreement with experiment. We argue that these effects may affect the determination of \alpha_s from deep-inelastic scattering.We review a formalism that includes the effects of nonperturbative U(1) symmetry breaking on the QCD evolution of nonsinglet structure functions. We show that a strong scale dependence is generated in an intermediate energy range $0.5 \lsim Q~2 \lsim 5$GeV$~2$ for all values of $x$. We show that this explains naturally the observed violation of the Gottfried sum, and allows a determination of the shape of the nonsinglet structure function, in excellent agreement with experiment. We argue that these effects may affect the determination of $\alpha_s$ from deep--inelastic scattering.hep-ph/9409249CERN-TH-7436-94hep-ph/9409249CERN-TH-7436-94oai:cds.cern.ch:2681831994-09-07
spellingShingle Particle Physics - Phenomenology
Particle Physics - Phenomenology
Forte, Stefano
Ball, Richard D.
Anomalous evolution of nonsinglet structure functions
title Anomalous evolution of nonsinglet structure functions
title_full Anomalous evolution of nonsinglet structure functions
title_fullStr Anomalous evolution of nonsinglet structure functions
title_full_unstemmed Anomalous evolution of nonsinglet structure functions
title_short Anomalous evolution of nonsinglet structure functions
title_sort anomalous evolution of nonsinglet structure functions
topic Particle Physics - Phenomenology
Particle Physics - Phenomenology
url https://dx.doi.org/10.1016/0920-5632(95)00037-A
http://cds.cern.ch/record/268183
work_keys_str_mv AT fortestefano anomalousevolutionofnonsingletstructurefunctions
AT ballrichardd anomalousevolutionofnonsingletstructurefunctions

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