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Interpretation of electron-proton scattering at low Q2
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics, High Energy Physics. Högenergifysik. (Teoretisk högenergifysik)
Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics. Uppsala University, Teknisk-naturvetenskapliga vetenskapsområdet, Physics, Department of Nuclear and Particle Physics, High Energy Physics. Högenergifysik. (Teoretisk högenergifysik)
2004 (English)In: Physics Letters B, ISSN 0370-2693, Vol. 596, 77-83 p.Article in journal (Refereed) Published
Abstract [en]

Low-Q2 photons do not resolve partons in the proton, which gives problems when applying the deep inelastic scattering formalism, such as an unphysical, negative gluon density extracted from data. Considering instead hadronic fluctuations of the photon, we show that the generalised vector meson dominance model (GVDM) gives a good description of the measured cross section at low Q2, i.e., reproduces F2(x,Q2), using only few parameters with essentially known values. Combining GVDM and parton density functions makes it possible to obtain a good description of F2 data over the whole range of x and Q2.

Place, publisher, year, edition, pages
2004. Vol. 596, 77-83 p.
Keyword [en]
Proton structure functions, Parton density functions, Generalised vector meson dominance, Low-Q2
National Category
Subatomic Physics
Identifiers
URN: urn:nbn:se:uu:diva-73799DOI: doi:10.1016/j.physletb.2004.06.076OAI: oai:DiVA.org:uu-73799DiVA: diva2:101709
Available from: 2005-06-20 Created: 2005-06-20 Last updated: 2011-01-12

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Publisher's full texthttp://dx.doi.org/10.1016/j.physletb.2004.06.076

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Alwall, JohanIngelman, Gunnar

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