Composite scalars at the LHC: the Higgs, the Sextet and the Octet

Abstract

We present a phenomenological theory of scalar particles that transform as a sextet and an octet of QCD interactions. These particles may arise as light bound states of a fundamental dynamics giving rise to a composite Higgs boson and partial compositeness for the top. As a concrete example, we discuss an explicit UV completion based on the SU(4)/Sp(4) coset, where QCD colour is carried by additional fundamental fermions charged under the confining gauge group. Top partners, as well as potentially even lighter coloured scalars, arise as bound states of the coloured fermions. We study production and detection at LHC Run I and II of the octet and sextet, setting lower limits on masses and couplings to Standard Model particles using existing 8 TeV analyses. We finally explore prospects for the ongoing 13 TeV Run II: we focus on final states with two same sign leptons, that have the potential to discriminate the sextet.

39 pages, 9 figures, 4 tables. Agrees with version published in JHEP. Changes w.r.t. v1: Fig. 1 added for illustration, U(1) charge in Tab. 1 corrected, references added

References in corpus (31)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• Parton distributions for the LHC
• A custodial symmetry for Zbb
• Light custodians in natural composite Higgs models
• The Composite Nambu-Goldstone Higgs
• Beyond the Minimal Composite Higgs Model
• Ultra Minimal Technicolor and its Dark Matter TIMP
• The Higgs boson from an extended symmetry
• A Higgs-Higgs bound state due to New Physics at a TeV
• Minimal Kinematic Constraints and MT2
• Search for production of vector-like quark pairs and of four top quarks in the lepton-plus-jets final state in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Colored Resonant Signals at the LHC: Largest Rate and Simplest Topology
• Search for supersymmetry at $\sqrt{s}=13$ TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector
• UV Completions of Partial Compositeness: The Case for a SU(4) Gauge Group
• A search for $t\bar{t}$ resonances using lepton-plus-jets events in proton-proton collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Search for resonant t t-bar production in proton-proton collisions at sqrt(s) = 8 TeV
• Spin Correlation Effects in Top Quark Pair Production at the LHC
• Fundamental Composite Higgs Dynamics on the Lattice: SU(2) with Two Flavors
• Search for new physics in events with same-sign dileptons and b-tagged jets in pp collisions at sqrt(s) = 7 TeV
• On the Interpretation of Top Partners Searches
• Fundamental Composite Electroweak Dynamics: Status at the LHC
• Search for supersymmetry at sqrt(s)=8 TeV in final states with jets and two same-sign leptons or three leptons with the ATLAS detector
• Beyond the Minimal Top Partner Decay
• Analysis of events with $b$-jets and a pair of leptons of the same charge in $pp$ collisions at $\sqrt{s}=8$ TeV with the ATLAS detector
• Color Sextet Scalars at the CERN Large Hadron Collider
• Top-antitop and Top-top Resonances in the Dilepton Channel at the CERN LHC
• Odd Top Partners at the LHC
• Automated next-to-leading order predictions for new physics at the LHC: the case of colored scalar pair production
• Color Sextet Vector Bosons and Same-Sign Top Quark Pairs at the LHC
• Search for standard model production of four top quarks in the lepton + jets channel in pp collisions at sqrt(s) = 8 TeV
• Multi-tops at the LHC

Cited by in corpus (62)

• Long-Lived Particles at the Energy Frontier: The MATHUSLA Physics Case
• Gauge theories of Partial Compositeness: Scenarios for Run-II of the LHC
• Sp(4) gauge theory on the lattice: towards SU(4)/Sp(4) composite Higgs (and beyond)
• Fundamental Composite Electroweak Dynamics: Status at the LHC
• Light scalars in composite Higgs models
• 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
• Sp(4) gauge theories on the lattice: $N_f=2$ dynamical fundamental fermions
• Di-boson signatures as Standard Candles for Partial Compositeness
• Electroweak phase transition with composite Higgs models: calculability, gravitational waves and collider searches
• Common exotic decays of top partners
• Sp(4) gauge theories on the lattice: Quenched fundamental and antisymmetric fermions
• Trigonometric Parity for the Composite Higgs
• Direct Bounds on Heavy Top-Like Quarks With Standard and Exotic Decays
• A Composite Higgs with a Heavy Composite Axion
• Vector and Axial-vector resonances in composite models of the Higgs boson
• Effective potential in ultraviolet completions for composite Higgs models
• Search for the production of four top quarks in the single-lepton and opposite-sign dilepton final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Exceptional Composite Dark Matter
• Lattice studies of the $Sp(4)$ gauge theory with two fundamental and three antisymmetric Dirac fermions
• Top-philic heavy resonances in four-top final states and their EFT interpretation
• Glueballs and Strings in $Sp(2N)$ Yang-Mills theories
• Modelling vector-like quarks in partial compositeness framework
• Probing TeV scale Top-Philic Resonances with Boosted Top-Tagging at the High Luminosity LHC
• Gluon-Photon Signatures for color octet at the LHC (and beyond)
• Exotic decays of top partners with charge 5/3: bounds and opportunities
• Phenomenology of unusual top partners in composite Higgs models
• Non-perturbative analysis of the spectrum of meson resonances in an ultraviolet-complete composite-Higgs model
• Lattice-Friendly Gauge Completion of a Composite Higgs with Top Partners
• Composite Higgses with seesaw EWSB
• Search for standard model production of four top quarks in proton-proton collisions at sqrt(s) = 13 TeV
• Precise predictions for $t\bar{t}\gamma /t\bar{t}$ cross section ratios at the LHC
• Processes that break baryon number by two units and the Majorana nature of the neutrino
• Colorful Imprints of Heavy States in the Electroweak Effective Theory
• Exploring holographic Composite Higgs models
• Dark matter in (partially) composite Higgs models
• Towards top-down holographic composite Higgs: minimal coset from maximal supergravity
• A composite scalar hint from di-boson resonances?
• UV Completed Composite Higgs model with heavy composite partners
• Toward minimal composite Higgs models from regular geometries in bottom-up holography
• Diphoton excess at 750 GeV: gluon-gluon fusion or quark-antiquark annihilation?
• Evidence for four-top quark production in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Diphotons from an Electroweak Triplet-Singlet
• Neutral-naturalness from a holographic SO(6)/SO(5) composite Higgs model
• B Anomalies and Leptoquarks at the LHC: Beyond the Lepton-Quark Final State
• Solving the Wrong Hierarchy Problem
• Vector-like quarks and heavy coloured bosons at the LHC
• Exploring extended Higgs sectors via pair production at the LHC
• Implications of Vector Boson Scattering Unitarity in Composite Higgs Models
• Coloured spin-1 states in composite Higgs models
• Light 't Hooft Top Partners
• Same-sign W pair production in composite Higgs models
• The Left-Right Symmetric Composite Higgs
• Large N Scalars: From Glueballs to Dynamical Higgs Models
• Jet-associated resonance spectroscopy
• Constraints on vector resonances from a strong Higgs sector
• Probing a ${\mathrm{Z}}^{\prime }$ with non-universal fermion couplings through top quark fusion, decays to bottom quarks, and machine learning techniques
• Partial compositeness under precision scrutiny
• Composite self-interacting dark matter and Higgs
• Boosting Beyond: A Novel Approach to Probing Top-Philic Resonances at the LHC
• Searching for top-philic heavy resonances in boosted four-top final states
• Probing a new strongly interacting sector via composite diboson resonances
• Electroweak spin-1 resonances in Composite Higgs models