New signals for singlet Higgs and vector-like quarks at the LHC

TL;DR

This paper explores an extension of the Standard Model with a singlet Higgs and vector-like quarks, predicting a distinctive six b-quark final state with leptons and missing energy at the LHC, which has negligible background.

Contribution

It introduces a novel scenario where heavy singlet Higgs and vector-like quarks produce a unique multi-b-quark and lepton final state at the LHC, with detailed phenomenological predictions.

Findings

Observable cross-sections for the predicted final state at 14 TeV LHC.

Negligible Standard Model background for the six b-quark and leptons final state.

Parameter space where the model is consistent with current Higgs data.

Abstract

We consider an extension of the Standard Model involving a singlet Higgs and down type vector-like quarks in the light of the current LHC Higgs data. For a good range of the parameters of the Higgs potential, and a mass range for the heavy vector-like quark, we find that the singlet heavy Higgs arising from the production and decay of the vector-like quarks give rise to (2b~4t) signal. The subsequent decay of the top quarks to $b W^{+}$ give rise to a final state with six b quarks, two same-sign charged leptons and missing transverse momenta with observable cross-sections at the 14 TeV run of the Large Hadron Collider. The Standard Model background for such a final state is practically negligible.