Searching for charged Higgs bosons in the B − L supersymmetric standard model at the high luminosity large hadron collider

W Abdallah,A Hammad,S Khalil,S Moretti

doi:10.1016/j.physletb.2018.10.065

Abstract

Upon assuming the B−L Supersymmetric Standard Model (BLSSM) as theoretical framework accommodating a multi-Higgs sector, we assess the scope of the High Luminosity Large Hadron Collider (HL-LHC) in accessing charged Higgs bosons (H±) produced in pairs from Z′ decays. We show that, by pursuing both di-jet and tau-neutrino decays, several signals can be established for H± masses ranging from about MW to above mt and Z′ masses between 2.5 TeV and 3.5 TeV. The discovery can be attained, in a nearly background free environment in some cases, owing to the fact that the very massive resonating Z′ ejects the charged Higgs bosons at very high transverse momentum, a kinematic region where any SM noise is hugely depleted.

Highlights

Searches for light charged Higgs bosons (H±) in the decay of top quarks, t → H±b, are presently being carried out at the Large Hadron Collider (LHC), with the assumption that their decay channels are dominated by H± → τ ντ or H± → jj, where j represents a jet and the possible partonic combinations are cs and cb
An intriguing one is the B − L Supersymmetric Standard Model (BLSSM), which, while inheriting the beneficial aspects of SUSY from the Minimal Supersymmetric Standard Model (MSSM), it surpasses it as it naturally predicts massive neutrinos, an enlarged Higgs sector and an expanded gauge symmetry (potentially a remnant of a Grand Unification Theory (GUT)) [5, 6] as well as a Dark Matter (DM) candidate that, thanks to its interactions with richer Higgs and gauge spectra, complies with both direct and indirect constraints better than the MSSM candidate [7,8,9,10]
The Branching Ratios (BRs) of the charged Higgs boson of the BLSSM can be seen in Fig. 2, wherein the BLSSM points have been generated over the following intervals of its fundamental parameters: 0.5 ≤ μ ≤ 3 TeV, 50 ≤ MA ≤ 103 TeV, 10 ≤ tan β ≤ 30, 0.3 ≤ gBL ≤ 0.75, − 0.3 ≤ g ≤ −0.2, M1 = 1.5 TeV, M2 = 1.5 TeV, M3 = 3.5 TeV, MA = 102 TeV, μ = 0.6 TeV

Summary

Introduction

Searches for light charged Higgs bosons (H±) in the decay of top quarks, t → H±b, are presently being carried out at the Large Hadron Collider (LHC), with the assumption that their decay channels are dominated by H± → τ ντ or H± → jj, where j represents a jet and the possible partonic combinations are cs and cb. For heavy H± states, with MH± > mt, one resorts instead to the H± → tb channel, via associated production of a charged Higgs boson with a top quark.

Results

Conclusion