Phenomenology of an $E_6$ inspired extension of Standard Model: Higgs sector

Abstract

We investigate a variant of Left-Right symmetric model based on $E_6$ inspired $SU(3{)}_C\otimes SU(2{)}_L\otimes U(1{)}_L\otimes SU(2{)}_R\otimes U(1{)}_R$ gauge group $(32121)$. Spontaneous breaking of $32121$ down to the Standard Model (SM) gauge group, requires a bi-doublet under $SU(2{)}_L\otimes SU(2{)}_R$, a right-handed doublet scalar under $SU(2{)}_R$ along with a $SU(2)$ singlet scalar boson. Symmetry breaking leads to several neutral and charged massive gauge bosons apart from the SM $W$ and $Z$. The Large Hadron Collider (LHC) results for the search of heavy gauge bosons can be used to constrain the vacuum expectation values responsible for giving masses to these extra heavy gauge bosons. Physical spectrum of the scalar bosons contains several neutral CP-even and CP-odd states and a couple of charged scalars apart from the SM-like Higgs boson. We have put constraints on the masses of some of these scalars from the existing LHC data. The possible decay rates and production cross-sections of these scalars have been investigated in some details. Production cross-sections for some of the scalars look promising at 14 TeV and 27 TeV run of the LHC with high luminosity option. As the model stems from Grand Unified group $E_6$, we keep all the fermions present in the $27$-dimensional fundamental representation of $E_6$. Mass limit of one such exotic lepton has also been derived from present LHC data. It is noted that some of these neutral exotic lepton or neutral scalar bosons of this model can serve the purpose of a cold dark matter.

23 pages, 18 figures, 1 table, Revised version accepted for publication in Physical Review D

References in corpus (16)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Search for new high-mass phenomena in the dilepton final state using 36 fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}$ = 13 TeV with the ATLAS detector
• Search for resonant and nonresonant new phenomena in high-mass dilepton final states at $\sqrt{s}=$ 13 TeV
• Collider Physics at the Precision Frontier
• Search for heavy charged long-lived particles in the ATLAS detector in 36.1 fb${}^{-1}$ of proton-proton collision data at $\sqrt{s}=13$ TeV
• Higgs boson potential at colliders: status and perspectives
• Search for charged Higgs bosons decaying into a top quark and a bottom quark at $\sqrt{s}$=13 TeV with the ATLAS detector
• Search for charged Higgs bosons decaying into a top and a bottom quark in the all-jet final state of pp collisions at $\sqrt{s}=$ 13 TeV
• Real singlet scalar dark matter extension of the Georgi-Machacek model
• Revisiting Generalized Two Higgs Doublet Model in the Light of Muon Anomaly and Lepton Flavor Violating Decays at HL-LHC
• Generalized 2HDM with wrong-sign lepton Yukawa coupling, in light of $g_{\mu }-2$ and lepton flavor violation at the future LHC
• A new feasible dark matter region in the singlet scalar scotogenic model
• The hidden side of scalar-triplet models with spontaneous CP violation
• The E6 route to multicomponent dark matter

Cited by in corpus (5)

• Topological structures, dark matter and gravitational waves in $E_6$
• Dark Matter perspective of Left-Right symmetric gauge model
• Heavy Higgs boson Searches at the LHC in the light of a Left-Right Symmetric Model
• The Resurgence of the G(2) Group for the Strong Sector and the Emergence of Dark Matter
• Tagging ultra-boosted jets at FCC-hh using machine learning techniques