Observability of inert scalars at the LHC

Majid Hashemi,Saereh Najjari

doi:10.1140/epjc/s10052-017-5159-0

Majid Hashemi, Saereh Najjari

Open Access

https://doi.org/10.1140/epjc/s10052-017-5159-0

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Abstract

In this work we investigate the observability of inert doublet model scalars at the LHC operating at the center of mass energy of 14 TeV. The signal production process is pp rightarrow AH^pm rightarrow ZHW^{pm }H leading to two different final states of ell ^+ell ^-Hjj H and ell ^+ell ^-Hell ^pm nu H based on the hadronic and leptonic decay channels of the W boson. All the relevant background processes are considered and an event selection is designed to distinguish the signal from the large Standard Model background. We found that signals of the selected search channels are well observable at the LHC with an integrated luminosity of 300 mathrm{{fb}}^{-1}.

Highlights

The Inert Doublet Model (IDM) is a special type of Two Higgs Doublet Model (2HDM); it respects a discrete Z2 symmetry under which the Standard Model (SM) fields are even while the inert doublet additional SU (2) scalar doublet D is odd, the neutral component of D could be a dark matter candidate [1,2,3,4,5,6,7]
The analysis is performed in two categories: di-lepton plus di-jet and tri-lepton final states, all of them produced through A0 H ± at the center of mass energy of 14 TeV
We presented the LHC potential for a dark matter search by introducing an analysis based on inert double model framework

Summary

Introduction

The Inert Doublet Model (IDM) is a special type of Two Higgs Doublet Model (2HDM); it respects a discrete Z2 symmetry under which the Standard Model (SM) fields are even while the inert doublet additional SU (2) scalar doublet D is odd, the neutral component of D could be a dark matter candidate [1,2,3,4,5,6,7]. After EWSB in the scalar sector this model has five physical states: the SM-like Higgs boson h as well as two charged scalars, H ±, and two neutral ones, H and A. In most analyses mentioned earlier, the neutral scalar, H , is assumed to be the dark matter candidate. This is not a requirement, we consider the scalar H to be lighter than the pseudoscalar A, the dark matter candidate. Signal events include both electrons and muons in the final states. The following processes are considered as the signal in our studies: 592 Page 2 of 14 qq → W ± → A H ± → Z (∗) H W ±(∗) H → + − H j j H, qq → W ± → A H ± → Z (∗) H W ±(∗) H → + − H ±ν H

Objectives

Findings

Discussion

Conclusion