Contribution of the hadronic component of a virtual photon to the structure function for charm leptoproduction at high x and Q(2)статья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The contribution of the hadronic component of a virtual photon to the structure function for charm leptoproduction is calculated. This contribution comes from the scattering of c quarks of a virtual photon on proton quarks and gluons. A comparison of the results of our calculations for this structure function with relevant data obtained by the European Muon Collaboration (EMC) for mu(+)p scattering gives reasons to believe that the contribution of the resolved photon may be responsible for the excess in these EMC data over the predictions of the model of photon-gluon fusion at high momentum transfers. Therefore, it may become possible to describe the EMC data without resort to the hypothesis of a nonperturbative charmed-quark admixture in the proton wave function (intrinsic-charm hypothesis). (C) 2003 MAIK "Nauka/Interperiodica".