Probing the Top-Higgs Sector with Composite Higgs Models at Present and Future Hadron Colliders

Abstract

We study the production of $t\bar{t}h$ and $t\bar{t}hh$ at hadron colliders, in the minimal Composite Higgs Models, based on the coset $SO(5)/SO(4)$. We explore the fermionic representations $5$ and $14$. A detailed phenomenological analysis is performed, covering the energy range of the LHC and its High Luminosity upgrade, as well as that of a future 100 TeV hadron collider. Both resonant and non-resonant production are considered, stressing the interplay and complementary interest of these channels with each other and double Higgs production. We provide sets of representative points with detailed experimental outcomes in terms of modification of the cross sections as well as resonance masses and branching ratios. For non-resonant production, we gauge the relative importance of Yukawa, Higgs trilinear, and contact $t\bar{t}hh$ vertices to these processes, and consider the prospect for distinguishing the fermion representations from each other and from the Standard Model. In the production of top partners, we find that the three-body decay channel $W^{+}{W}^{-}t$ becomes significant in certain regions of parameter space having a degenerate spectrum, and is further enhanced with energy. This motivates both higher energy machines as well as the need to go beyond the current analysis performed for the searches for these resonances.

arXiv comment68 pages, 21 figures, supplementary figures in ancillary directory

References in corpus (46)

• 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
• A Large Mass Hierarchy from a Small Extra Dimension
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• FeynRules 2.0 - A complete toolbox for tree-level phenomenology
• The Minimal Composite Higgs Model
• Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
• Bulk Fields and Supersymmetry in a Slice of AdS
• The Strongly-Interacting Light Higgs
• MadAnalysis 5, a user-friendly framework for collider phenomenology
• A custodial symmetry for Zbb
• Flavor Structure of Warped Extra Dimension Models
• The Composite Nambu-Goldstone Higgs
• Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
• Observation of $\mathrm{t}\overline{\mathrm{t}}$H production
• Physics Opportunities of a 100 TeV Proton-Proton Collider
• Precision Measurements of Higgs Couplings: Implications for New Physics Scales
• On the Tuning and the Mass of the Composite Higgs
• Light top partners and precision physics
• Combination of the searches for pair-produced vector-like partners of the third-generation quarks at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• The Composite Higgs and Light Resonance Connection
• Anomalous Couplings in Double Higgs Production
• Realistic Composite Higgs Models
• Flavor and CP Invariant Composite Higgs Models
• Higgs At Last
• Higgs Low-Energy Theorem (and its corrections) in Composite Models
• A Systematic Approach to the SILH Lagrangian
• Measurement of the $t\bar{t}Z$ and $t\bar{t}W$ cross sections in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Minimal Composite Higgs Models at the LHC
• Search for vector-like T and B quark pairs in final states with leptons at $\sqrt{s}=$ 13 TeV
• Search for pair production of up-type vector-like quarks and for four-top-quark events in final states with multiple $b$-jets with the ATLAS detector
• Measurement of top quark pair production in association with a Z boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Higgs Pair Production: Choosing Benchmarks With Cluster Analysis
• Di-Higgs phenomenology: The forgotten channel
• A naturally light Higgs without light Top Partners
• Oblique S and T Constraints on Electroweak Strongly-Coupled Models with a Light Higgs
• The S parameter for a Light Composite Higgs: a Dispersion Relation Approach
• Probing the Higgs self-coupling through double Higgs production in vector boson scattering at the LHC
• Prospects of searching for composite resonances at the LHC and beyond
• Resolving the degeneracy in top quark Yukawa coupling with Higgs pair production
• Search for nonresonant Higgs boson pair production in the $\mathrm{b}\overline{\mathrm{b}}\mathrm{b}\overline{\mathrm{b}}$ final state at $\sqrt{s}=$ 13 TeV
• Constraining Composite Higgs Models using LHC data
• The linear-non-linear frontier for the Goldstone Higgs
• Single and double production of the Higgs boson at hadron and lepton colliders in minimal composite Higgs models
• Exploring holographic Composite Higgs models
• EFTs meet Higgs Nonlinearity, Compositeness and (Neutral) Naturalness