Charged Higgs boson phenomenology in Supersymmetric models with Higgs triplets

TL;DR

This paper explores the phenomenology of charged and neutral Higgs bosons in an extended supersymmetric model with Higgs triplets, analyzing their masses, couplings, and experimental bounds to guide future collider searches.

Contribution

It provides an approximate calculation of radiative corrections and derives experimental bounds on Higgs masses in a supersymmetric model with Higgs triplets, highlighting potential signals at the LHC.

Findings

Some light charged Higgs bosons (~90 GeV) are not excluded by current experiments.

Radiative corrections significantly affect Higgs mass predictions.

Certain parameter regions suggest detectable Higgs signals at the LHC.

Abstract

We present a detailed study of the Higgs sector within an extension of the Minimal Supersymmetric Standard Model that includes one Complex Higgs Triplet (MSSM+1CHT). The model spectrum includes three singly charged Higgs bosons as well as three CP-even (or scalar) and two CP-odd (or pseudoscalar) neutral Higgs bosons. We present an approximated calculation of the one-loop radiative corrections to the neutral CP-even Higgs masses ($m_{H_i^0}$) and the couplings $H_i^0 Z^0 Z^0$ ($i=1$, 2, 3), which determine the magnitude of the Higgs-strahlung processes $e^+ e^-\to Z^0 H^0_i$. Limits from LEP2 are then considered, in order to obtain bounds on the neutral Higgs sector. Further, we also include the experimental limits from LEP2 on $e^+e^-\to H^+H^-$ and those on BR($t \to b H^+$) from Tevatron, to derive bounds on the mass of the two lightest charged Higgs bosons ($H_1^{\pm}$ and $H_2^{\pm}$). Concerning the latter, we find some cases, where $m_{H_1^{\pm}} \simeq 90$ GeV, that are not excluded by any experimental bound, even for large values of $\tan\beta$, so that they should be looked for at the Large Hadron Collider (LHC).