Investigation of the inelastic electroproduction of J/ψ mesons at the HERA collider within the semihard QCD approach

The results of theoretical calculations within the semihard (k _T-factorization) approach are compared with the latest data obtained in the ZEUS experiment at the HERA collider for the inelastic electroproduction of J/ψ mesons in the kinematical region specified by the inequalities 2 GeV² < Q ² < 80 GeV², 50 GeV < W < 250 GeV, 0.2 < z < 0.9, and ?1.6 < y _ψlab < 1.3. The dependence of these theoretical results on the choice of parametrization among three widely used parametrizations of unintegrated gluon distributions is studied.