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Quark Asymmetries i...
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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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LIBRIS-ID:oai:DiVA.org:uu-77162
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https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-77162URI
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https://doi.org/10.1103/PhysRevD.71.094015DOI
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Language:English
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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)
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Uppsala universitetInstitutionen för kärn- och partikelfysik
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In:Physical Review D71:094015
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