Light Higgs Boson Production in Two Higgs Doublets Models Type III

Although a relatively light Higgs boson coming from the SM can support the idea of the SM being true all the way to the Plank scale, most theorists consider such a possibility unlikely [1]. A light Higgs boson is preferred by precision fits of the Standard Model (SM) [2] and also theoretically required by many frameworks that can be effectively SM-like at low energies. The production of a Higgs boson in association with a heavy quark and antiquark pair (both tt̄ and bb̄) at hadron colliders will be sensitive to the Higgs-fermion couplings and can help discriminate between models. One of such models is the so-called 2HDM, which includes a second scalar doublet with the same properties of the first one. In this paper, by using the framework of the 2HDM-III and the CSY anzats (section II), we calculate the associated bquark/Higgs boson production at the TEVATRON collider. By comparing the results obtained in the simulation with experimental data released by the D0 collaboration we find bounds over the λbb parameter of the coupling (section III). The bounds found let us estimate the associated higgs/bottom production in the Large Hadron Collider (section IV). Finally, in section V we state our concluding remarks.