This study explores the possibility of discovering   $ H^{\pm} $   through its bosonic decays, i.e.,   $ H^{\pm} $   (where ϕ = h or A), within the Type-I two Higgs doublet model (2HDM). The main objective is to demonstrate the available parameter space after applying recent experimental and theoretical exclusion limits. We suggest that   $ H^{\pm} $  = 150 GeV is the most probable mass for the   $ H^{\pm} $   decay channel in   $ H^{\pm} $   collisions at   $ H^{\pm} $  = 8, 13, and 14 TeV. We also report on the application of a modern machine learning approach to a multivariate technique for heavy charged Higgs production in association with a single top quark through weak interaction to demonstrate its observability in comparison with the most relevant Standard Model backgrounds using the neural networks of boosted decision Tree (BDT), likelihood (LH), and multilayer perceptron (MLP).

Pakistan

Ijaz Ahmed

Waqas Ahmad

M.S. Amjad

South Korea

Jamil Muhammad

Observability of parameter space for charged Higgs boson in its bosonic decays in two Higgs doublet model Type-1

Top quark production in the process e+e-âttÂ¯ at a future linear electron positron collider with polarised beams is a powerful tool to determine indirectly the scale of new physics. The presented study, based on a detailed simulation of the ILD detector concept, assumes a centre-of-mass energy of s=500 Â GeV and a luminosity of L=500fb-1 equally shared between the incoming beam polarisations of Pe-,Pe+=Â±0.8,â0.3 . Events are selected in which the top pair decays semi-leptonically and the cross sections and the forwardâbackward asymmetries are determined. Based on these results, the vector, axial vector and tensorial CP conserving couplings are extracted separately for the photon and the Z0 component. With the expected precision, a large number of models in which the top quark acts as a messenger to new physics can be distinguished with many standard deviations. This will dramatically improve expectations from e.g. the LHC for electro-weak couplings of the top quark.