The structure functions F_2^c and F_L^c in the framework of the k_T factorization
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We present the perturbative parts of the structure functions F_2^c and F_L^c for a gluon target having nonzero transverse momentum squared at order α_s. The results of the double convolution (with respect to the Bjorken variable x and the transverse momentum) of the perturbative part and the unintegrated gluon densities are compared with HERA experimental data for F_2^c. The contribution from F_L^c structure function ranges 10\div30% of that of F_2^c at the HERA kinematical range.
8 pages, 2 figures, latex. Talk presented at the XVIth International Workshop "High Energy Physics and Quantum Field Theory", Moscow, September 2001
8 pages, 2 figures, latex. Talk presented at the XVIth International Workshop "High Energy Physics and Quantum Field Theory", Moscow, September 2001