Higgs bosons: discovered and hidden, in extended Supersymmetric Standard Models at the LHC

TL;DR

This paper explores an extended Supersymmetric Standard Model with additional Higgs fields, analyzing the potential for light Higgs bosons below 100 GeV, their exotic decays, and prospects for detection at the LHC.

Contribution

It introduces a specific extended MSSM model with a Higgs triplet and singlet, and investigates the phenomenology of light Higgs bosons and their experimental signatures.

Findings

Light Higgs bosons below 100 GeV are consistent with current data.

Exotic Higgs decay channels into light Higgs pairs are possible.

Certain parameter regions can be probed with 25 fb$^{-1}$ at the LHC.

Abstract

We investigate an extension of the Minimal Supersymmetric Standard Model (MSSM) containing a $SU(2)$ Higgs triplet of zero hypercharge and a gauge singlet. We focus on a scenario of this model which allows a light pseudoscalar and/or a scalar below $100$ GeV in the spectrum, consistent with the most recent data from the LHC and the earlier data from the LEP experiments. We analyze the exotic decay of the discovered Higgs $(h_{125})$ into two light (hidden) Higgs bosons present in the extension. The latter are allowed by the uncertainties in the Higgs decay $h_{125}\to WW^*$, $h_{125}\to ZZ^*$ and $h_{125}\to \gamma\gamma$. We have searched for such light Higgs bosons in the $2b+2\tau$, $\geq 3\tau$, $2b+2\mu$ and $2\tau+2\mu$ final states at the LHC with 13 and 14 TeV. A region of such parameter space can be explored with an integrated luminosity of 25 fb$^{-1}$ at the LHC.