Charged Higgs Contribution into (t b_bar)-pair Production in Hadronic   Collisions
  We investigate the charged Higgs boson contribution into $t\bar b$-pair production in pp-collisions at LHC. It is shown that due to the $\cz$-boson exchange the total yield of $t\bar b$ is modified significantly for small and large values of $\tan\beta$. However, for the small values of $\tan\beta$ one should expect also the production of right-polarized top quark contrary to pure left-polarized t-quark production through $W^{\pm}$-boson exchange only. This fact provides a possibility to separate $H^{\pm}$ and $W^{\pm}$ contributions by means of the investigations of angular distributions of top decay products. The detailed simulation of the signal and relevant background processes is performed. 
M.V. Foursa, D.A. Murashev, and S.R. Slabospitsky, (Institute for High   Energy Physics, Protvino, Russia)