# Hard Donnachie — Landshoff pomeron in coherent ρ-meson photoproduction at small momentum transfered

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Abstract:

We calculate the cross sections of coherent ρ-meson photoproduction in the terms of Donnachie — Landshoff (DL) model for experimental data description on HERA. Examination of coherent light vector meson production with high rapidities in proton-nuclear collisions on Large Hadron Collider allows to answer the question whether it is necessary to take in account the contribution of hard pomeron exchange for the soft interaction description in DL-model.