Universal Doublet-Singlet Higgs Couplings and phenomenology at the CERN Large Hadron Collider

Abstract

We consider a minimal extension of the standard model where a real, gauge singlet scalar field is added to the standard spectrum. Introducing the Ansatz of universality of scalar couplings, we are led to a scenario which has a set of very distinctive and testable predictions: (i) the mixing between the standard model Higgs and the new state is near maximal, (ii) the ratio of the two Higgs mass eigenstates is fixed ($\sim \sqrt{3}$), (iii) the decay modes of each of the two eigenstates are standard model like. We also study how electroweak precision tests constrain this scenario. We predict the lighter Higgs to lie in the range of 114 and 145 GeV, and hence the heavier one between 198 and 250 GeV. The predictions of the model can be tested at the upcoming LHC.

arXiv comment5 pages, no figures; v2: normalisations settled, results unchanged, References added; v3: a new section 'Deviation from universality' added, version to appear in Phys Rev D (Brief Reports section)

References in corpus (13)

• Search for the Standard Model Higgs Boson at LEP
• Gauge Singlet Scalars as Cold Dark Matter
• Echoes of a Hidden Valley at Hadron Colliders
• The Twin Higgs: Natural Electroweak Breaking from Mirror Symmetry
• LHC Phenomenology of an Extended Standard Model with a Real Scalar Singlet
• Singlet Higgs Phenomenology and the Electroweak Phase Transition
• A Minimal Spontaneously Broken Hidden Sector and its Impact on Higgs Boson Physics at the Large Hadron Collider
• The New Minimal Standard Model
• Higgs-field Portal into Hidden Sectors
• Difficult Scenarios for NMSSM Higgs Discovery at the LHC
• The minimal non-minimal standard model
• Predicting Vckm with Universal Strength of Yukawa Couplings
• Unity of elementary particles and forces in higher dimensions

Cited by in corpus (20)

• Status of the Higgs Singlet Extension of the Standard Model after LHC Run 1
• Probing the Standard Model with Higgs signal rates from the Tevatron, the LHC and a future ILC
• Heavy Dark Matter Through the Higgs Portal
• Dynamics of Perturbations in Double Field Theory & Non-Relativistic String Theory
• Search for a Higgs boson in the mass range from 145 to 1000 GeV decaying to a pair of W or Z bosons
• Delta r and the W-boson mass in the Singlet Extension of the Standard Model
• LHC Benchmark Scenarios for the Real Higgs Singlet Extension of the Standard Model
• The Higgs Singlet extension parameter space in the light of the LHC discovery
• Probing Hidden Sector Photons through the Higgs Window
• Heavy to light Higgs boson decays at NLO in the Singlet Extension of the Standard Model
• Phenomenology of the minimal $B-L$ extension of the Standard Model: the Higgs sector
• Hiding the Higgs Boson with Multiple Scalars
• Polarized vector boson scattering in the fully leptonic WZ and ZZ channels at the LHC
• Heavy Higgs signal-background interference in gg --> VV in the Standard Model plus real singlet
• Phenomenology of the minimal B-L extension of the Standard Model at the LHC
• Inverse Amplitude Method for Perturbative Electroweak Symmetry Breaking Sector: The Singlet Higgs Portal as a Study Case
• New signals for singlet Higgs and vector-like quarks at the LHC
• Hidden Extra U(1) at the Electroweak/TeV Scale
• Higgs interference effects at the one-loop level in the 1-Higgs-Singlet extension of the Standard Model
• Higgs interference effects in top-quark pair production in the 1HSM