Top quarks produced in pairs are predicted to experience spin correlations. Due to the large tt statistics expected for the LHC, it should be possible to search for new physics effects in angular variables sensitive to these correlations. We investigate, for a general two-Higgs Doublet Model (2HDM), the charged Higgs boson decay of the top quark through the channel t → bH → bτντ . Analytic resu...

Higgs portal models are the most minimal way to explain relic abundance of Universe. They add just a singlet that only couples through single parameter controls both dark matter and direct detection cross-section. Unfortunately this scenario, either with scalar or fermionic matter, is almost ruled out by latter. In paper we analyze Higgs-portal idea in context 2HDM. By disentangling couplings r...

The exceptional region of the parameter space (ERPS) two Higgs doublet model (2HDM) is defined to be regime where scalar potential takes on a very special form. In standard parametrization 2HDM with squared mass parameters ${m}_{11}^{2}$, ${m}_{22}^{2}$, ${m}_{12}^{2}$, and dimensionless couplings, ${\ensuremath{\lambda}}_{1},{\ensuremath{\lambda}}_{2},\dots{},{\ensuremath{\lambda}}_{7}$, ERPS ...

In this work, we present a study of the neutral Higgs bosons in two doublet model (2HDM) terms their production processes and decay channels as function parameters. The analysis is performed for all four types 2HDM most promising are identified each type model. Several boson mass scenarios below above threshold to gauge pair introduced corresponding categories final states analyzed. event inclu...