H. Cardenas | Searcharxiv

arXiv2012

The role of charged Higgs boson decays in the determination of tanβ-like parameters

The most commonly used parameterizations of the Yukawa couplings in the two Higgs doublet model are revisited. Their similitudes and differences are emphasized and relations between the different notations used in the literature are derived. Using these relations, bounds on the space of parameters of the charged Higgs sector of the two Higgs doublet model are obtained. These constraints are obtained from flavor observables like the measurement of B -> Xs γand the recent measurement of Bs -> μ+ μ- from LHCb. The ratio R_{H+}=B(H+ -> τ^+ ν_τ)/B(H+ -> t b) is evaluated for the two Higgs doublet model type-III and type-II, and their differences are quantified.

hep-ph↗

arXiv2011

Constraints on the charged Higgs boson of the two Higgs doublet model type III

The D0 experiment has reported a direct search for a charged Higgs boson produced by $q \bar q$ annihilation and decaying to $t \bar b$ final state, in the $180 \leq M_{H^+} \leq 300$ GeV mass range. The analysis has lead to upper limits on the production cross section in the framework of the two Higgs doublet model types I, II and III. We compare the predictions of two different scenarios in the framework of the two Higgs doublet type III to the cross section limits reported by D0 collaboration, and we obtain constraints on the charged Higgs mass, for the case when the charged Higgs mass is bigger than the top quark mass. Also, searches for the charged Higgs boson with a mass smaller than top quark mass are considered, we discuss the possible limits on the charged Higgs boson mass obtained from measurements of the ratio $R_σ=σ_{t \bar t}^{l+jets}/σ_{t \bar t}^{dileptons}$ within the two Higgs doublet model type III.

hep-ph↗