Implications of 98 GeV and 125 GeV Higgs scenario in non-decoupling SUSY with updated ATLAS, CMS and PLANCK data

TL;DR

This paper explores the coexistence of a 98 GeV Higgs and a 125 GeV Higgs within non-decoupling SUSY models, analyzing experimental constraints and prospects for detection at the LHC and ILC.

Contribution

It identifies viable MSSM parameter regions for the 98 GeV Higgs scenario consistent with current data and discusses detection prospects at future colliders.

Findings

Allowed non-decoupling MSSM regions with a 98 GeV Higgs.

Potential 2.5σ signal at 14 TeV LHC with 300 fb⁻¹.

Constraints from Higgs data, dark matter relic density, and superparticle mass limits.

Abstract

We discuss both MSSM and NMSSM scenarios in which the lightest Higgs boson with $m_h=98$~GeV is consistent with the small excess ($\sim 2.3 \sigma$) observed at the LEP in $e^+ e^-\rightarrow Zh$, with $h \rightarrow b {\bar b}$ process and the heavier Higgs boson of mass close to 125~GeV as the observed candidate of the SM Higgs like particle at the LHC. We show the allowed regions in the non-decoupling Higgs zone of MSSM parameter space which are consistent with several low energy constraints coming from heavy flavour physics, latest experimental data on Higgs signals and lower limit on superparticle masses from 7~TeV and 8~TeV LHC run. We also implement the constraints from the relic density of the cold dark matter as obtained from the recent PLANCK data. Additionally, we discuss the possibility of observing the light Higgs boson of mass 98~GeV at the 14~TeV LHC run via $pp \rightarrow V h$, with $h \rightarrow b \bar b$ using the technique of jet substructure. Our analysis shows that at 14~TeV LHC run with 300 ${\rm fb}^{-1}$ luminosity the signal efficiency of such a light Higgs boson is at most 2.5$\sigma$. Finally, we make a comment on the prospect of proposed $e^+ e^-$ ILC to discover/exclude this light Higgs boson.