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The contribution of off-shell gluons to the structure functions F 2 and $F_{\mathrm {L}}^c$ and the unintegrated gluon distributions

A.V. Kotikov, A.V. Lipatov, G. Parente, N.P. Zotov
2002 European Physical Journal C: Particles and Fields  

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2001 pre-print arXiv:hep-ph/0107135v1 fatcat:2yvdzr2arfeppnvrjpwmlfqw3q
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) that of F_2^c at the kinematical range of HERA experiments.
doi:10.1140/epjc/s2002-01036-y fatcat:rxpj27orhzepnnwbctqjgv7pjy
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A.V. Kotikov, A.V. Lipatov, G. Parente, N.P. Zotov. "The contribution of off-shell gluons to the structure functions F 2 and $F_{\mathrm {L}}^c$ and the unintegrated gluon distributions." European Physical Journal C: Particles and Fields 26.1 (2002) 51-66