Electroproduction of J/psi mesons within the semihard QCD approach and the color-singlet modelстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:The deep-inelastic production of J/psi mesons in electron-proton interactions at the HERA collider is considered within the semihard (kt-factorization) QCD approach and within the color-singlet model. The dependence of the Q2, pt2, z, y* and W distributions of J/psi mesons on various sets of unintegrated gluon distributions and the dependence of the spin parameter alpha on pt2 and Q2 are investigated. The results of the calculations are compared with the latest experimental data obtained by the H1 and ZEUS Collaborations at the HERA collider. It is shown that experimental investigations of the polarization properties of J/psi mesons over the kinematical region Q2 < 1 GeV2 may provide an additional test of the statement that the dynamics of gluon distributions is governed by the Balitsky-Fadin-Kuraev-Lipatov equations.