Fermionic decays of NMSSM Higgs bosons under LHC 13 TeV constraints

Marwa Telba,Maien Binjonaid

doi:10.1016/j.rinp.2021.104464

Abstract

This paper investigates the impact of the recent LHC constraints on the Higgs sector in the semi-constrained version of the Next-to-Minimal Supersymmetric Standard Model. Our analysis focuses on the parameter space for which the value of the Higgs doublet-singlet coupling, λ, is large as possible, while the ratio between the vacuum expectation values of the two Higgs doublets, tanβ, is small as possible. Under the current constraints, we present the possible fermionic decay channels and reduced cross-section into fermions final states for the lightest neutral Higgs bosons in the NMSSM, (h1,h2, and a1). We found that the branching ratios of the non SM-like Higgs (a1 and h2) into a pair of bottom quarks are near 90% level when the Higgs mass below 400 GeV. Moreover, the branching ratio of h2/a1→tt¯ can reach unity for all mass ranges when these bosons are mostly singlet.

Highlights

In 2012, ATLAS and CMS at the Large Hadron Collider announced the detection of a Higgs-like particle with a mass of around 125 GeV and its measurements consistent with the Standard Model’s prediction [1,2]
We will apply this method to predict the effect of the recent constraints of the LHC on fermionic decays of neutral Higgs particles in semi-constrained NMSSM (scNMSSM)
The Next-to-minimal supersymmetric standard model (NMSSM) parameter space was extensively scanned with GUT boundary conditions using the NMSSMTools (v.5.5.2) pack age [38–42]

Summary

Introduction

In 2012, ATLAS and CMS at the Large Hadron Collider announced the detection of a Higgs-like particle with a mass of around 125 GeV and its measurements consistent with the Standard Model’s prediction [1,2]. We showed the effect of the recent constraints on the properties of the neutral Higgs bosons, such as the mass spectrum, the singlet and doublets components, the reduced couplings of such particles, and their decays and reduced cross-section to bosons [37].

Results

Conclusion