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The contribution of off-shell gluons to the structure functions F_2^c and F_L^c$ and the unintegrated gluon distributions

A. V. Kotikov·A. V. Lipatov·G. Parente·N. P. Zotov
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Abstract

We calculate 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 $x_B$ 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 (10-30)% of that of $F_2^c$ at the kinematical range of HERA experiments.

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A. V. Kotikov, A. V. Lipatov, G. Parente, N. P. Zotov. 2001-07-12. The contribution of off-shell gluons to the structure functions F_2^c and F_L^c$ and the unintegrated gluon distributions. https://doi.org/10.1140/epjc%2Fs2002-01036-y

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