Theory and Phenomenology of Two Higgs Doublet Type-II Seesaw Model at the LHC Run-2

Abstract

We study the most popular scalar extension of the Standard Model, namely the Two Higgs doublet model, extended by a complex triplet scalar (2HDMcT). Such considering model with a very small vacuum expectation value, provides a solution to the massive neutrinos through the so-called type II seesaw mechanism. We show that the 2HDMcT enlarged parameter space allow for a rich and interesting phenomenology compatible with current experimental constraints. In this paper the 2HDMcT is subject to a detailed scrutiny. Indeed, a complete set of tree level unitarity constraints on the coupling parameters of the potential is determined, and the exact tree-level boundedness from below constraints on these couplings are generated for all directions. We then perform an extensive parameter scan in the 2HDMcT parameter space, delimited by the above derived theoretical constraints as well as by experimental limits. We find that an important triplet admixtures are still compatible with the Higgs data and investigate which observables will allow to restrict the triplet nature most effectively in the next runs of the LHC. Finally, we emphasize new production and decay channels and their phenomenological relevance and treatment at the LHC.

arXiv comment42 pages, 11 figures, references added

References in corpus (31)

• 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
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• HiggsBounds: Confronting Arbitrary Higgs Sectors with Exclusion Bounds from LEP and the Tevatron
• Muon Decay and Physics Beyond the Standard Model
• HiggsSignals: Confronting arbitrary Higgs sectors with measurements at the Tevatron and the LHC
• HiggsBounds 2.0.0: Confronting Neutral and Charged Higgs Sector Predictions with Exclusion Bounds from LEP and the Tevatron
• SusHi: A program for the calculation of Higgs production in gluon fusion and bottom-quark annihilation in the Standard Model and the MSSM
• Note on tree-level unitarity in the General Two Higgs Doublet Model
• Dark matter in the Inert Doublet Model after the discovery of a Higgs-like boson at the LHC
• General formulae for f1 --> f2 gamma
• The Higgs Potential in the Type II Seesaw Model
• Search for an additional, heavy Higgs boson in the $H\to ZZ$ decay channel at $\sqrt{s}$ = 8 TeV in $pp$ collision data with the ATLAS detector
• 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
• Testing Higgs Triplet Model and Neutrino Mass Patterns
• SusHi Bento: Beyond NNLO and the heavy-top limit
• Higgs boson decay into 2 photons in the type~II Seesaw Model
• Lepton Flavour Violating Decays tau to lll and mu to e gamma in the Higgs Triplet Model
• Search for a high-mass Higgs boson decaying to a $W$ boson pair in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Verifiable Model of Neutrino Masses from Large Extra Dimensions
• μ-e conversion in nuclei versus μ-->e γ: an effective field theory point of view
• Phenomenology of the Neutrino-Mass-Giving Higgs Triplet and the Low-Energy Seesaw Violation of Lepton Number
• Lepton flavor violation in the triplet Higgs model
• Consistency of the triplet seesaw model revisited
• Making the small oblique parameters large
• Unitarity constraints on scalar parameters of the Standard and Two Higgs Doublets Model
• Neutrino Masses in a Two Higgs Doublet Model with a U(1) Gauge Symmetry
• Naturalness in Type II seesaw model and implications for physical scalars
• Degenerate Higgs bosons decays to $\gamma \gamma$ and $Z\gamma$ in the type II Seesaw Model
• Two-Higgs-Doublet Type-II Seesaw Model

Cited by in corpus (7)

• Muon $g-2$ in a two-Higgs-doublet model with a type-II seesaw mechanism
• Vacuum Stability Conditions for Higgs Potentials with $SU(2{)}_L$ Triplets
• The Higgs Potential in 2HDM extended with a Real Triplet Scalar: A roadmap
• Electric dipole moment of the neutron in Two Higgs Doublet Models with flavor changing
• Consistency of New CDF-II W Boson Mass with 123-Model
• Unitarity bounds on extensions of Higgs sector
• Vacuum Structure of an Extended Standard Model with $U(1{)}_D$ Symmetry