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We present calculations of the beauty photoproduction at HERA collider in theframework of the kt-factorization approach. Both direct and resolved photoncontributions are taken into account. The unintegrated gluon densities in aproton and in a photon are obtained from the full CCFM, from unified BFKL-DGLAPevolution equations as well as from the Kimber-Martin-Ryskin prescription. Weinvestigate different production rates (both inclusive and associated withhadronic jets) and compare our theoretical predictions with the recentexperimental data taken by the H1 and ZEUS collaborations. Special attention isput on the x_{\gamma}^{obs} variable which is sensitive to the relativecontributions to the beauty production cross section.Comment: 29 pages, 15 figures, 2 table

physical review. d. particles, fields, gravitation, and cosmology/physical review. d, particles, fields, gravitation, and cosmology

Beauty photoproduction at HERA:<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msub><mml:mi>k</mml:mi><mml:mi>T</mml:mi></mml:msub></mml:math>-factorization versus experimental data

Beauty photoproduction at HERA:kT-factorization versus experimental data