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  • Alwall, JohanUppsala universitet,Institutionen för kärn- och partikelfysik,Högenergifysik,Teoretisk högenergifysik (author)

Quark Asymmetries in the Proton from a Model for Parton Densities

  • Article/chapterEnglish2005

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  • 2005
  • printrdacarrier

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  • LIBRIS-ID:oai:DiVA.org:uu-77162
  • https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-77162URI
  • https://doi.org/10.1103/PhysRevD.71.094015DOI

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  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype

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  • Based on quantum fluctuations in momentum and of the proton into meson-baryon pairs, we develop a physical model for the non-perturbative x-shape of parton density functions in the proton. The model describes the proton structure function and gives a natural explanation of observed quark asymmetries, such as the difference between the anti-up and anti-down sea quark distributions and between the up and down valence distributions. An asymmetry in the momentum distribution of strange and anti-strange quarks in the nucleon is found to reduce the NuTeV anomaly to a level which does not give a significant indication of physics beyond the standard model.

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  • Ingelman, GunnarUppsala universitet,Institutionen för kärn- och partikelfysik,Högenergifysik,Teoretisk högenergifysik(Swepub:uu)gunninge (author)
  • Uppsala universitetInstitutionen för kärn- och partikelfysik (creator_code:org_t)

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  • In:Physical Review D71:094015

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