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The application of k_t-factorization supplemented with the CCFM small-xevolution equation to heavy quark production at the TEVATRON and at HERA isdiscussed. The bb_bar production cross sections at the TEVATRON can beconsistently described using the k_t-factorization formalism together with theunintegrated gluon density obtained within the CCFM evolution approach from afit to HERA F_2 data. Special attention is drawn to the comparison withmeasured visible cross sections, which are compared to the hadron level MonteCarlo generator CASCADEComment: 13 pages, updated references and updated Fig. 9, Fig. 2 replace

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

Heavy quark production at the Fermilab Tevatron and DESY<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>ep</mml:mi></mml:math>collider HERA using<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi>k</mml:mi></mml:mrow><mml:mrow><mml:mi>t</mml:mi></mml:mrow></mml:msub></mml:mrow></mml:math>factorization with the CCFM evolution approach

Heavy quark production at the Fermilab Tevatron and DESYepcollider HERA usingktfactorization with the CCFM evolution approach