A Contribution of Photon Hadronic Component in the Leptoproduction Charmed Structure Function at Large x and Q^2

Details A Contribution of Photon Hadronic Component in the Leptoproduction Charmed Structure Function at Large x and Q^2 A Contribution of Photon Hadronic Component in the Leptoproduction Charmed Structure Function at Large x and Q^2

2001-06-26

arxiv.org/abs/hep-ph/0106284v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 2 PostScript figures, Latex2e. In new version two misprints in references corrected

Scientific paper

We calculated the contribution of the photon hadronic component in the charmed structure function of the leptoproduction. The contribution comes from scattering of the c quarks of the virtual photon on the quarks and gluons of the proton. Comparison of our calculations with the measurements of the charm production in $\mu^+p$-scattering by EMC shows, that contribution of resolved photon can explain the excess of EMC data over the predictions of the photon-gluon fusion model at large momentum transfers. Thus, one does not need to use a non-perturbative admixture of the charmed quarks in the proton wave function (''intrinsic charm'') to describe such an excess in EMC data.

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