Heavy-quark hadroproduction in kT-factorization approach with unintegrated gluon distributions

We consider the processes of heavy-quark production using the unintegrated gluon distributions. The numerical predictions for high-energy nucleon-nucleon and photon-nucleon collisions of the k(T)-factorization approach (semihard theory) are compared with the experimental data from the Tevatron collider and HERA. The total production cross sections and P-T distributions are considered and they are in reasonable agreement with the data for reasonable values of QCD scale.