Charged Higgs Contribution into (t b_bar)-pair Production in Hadronic Collisions

Abstract

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.