Search for vector-like T quarks decaying to top quarks and Higgs bosons in the all-hadronic channel using jet substructure

Abstract

A search is performed for a vector-like heavy T quark that is produced in pairs and that decays to a top quark and a Higgs boson. The data analysed correspond to an integrated luminosity of 19.7 inverse femtobarns collected with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV. For T quarks with large mass values the top quarks and Higgs bosons can have significant Lorentz boosts, so that their individual decay products often overlap and merge. Methods are applied to resolve the substructure of such merged jets. Upper limits on the production cross section of a T quark with mass between 500 and 1000 GeV are derived. If the T quark decays exclusively to tH, the observed (expected) lower limit on the mass of the T quark is 745 (773) GeV at 95% confidence level. For the first time an algorithm is used for tagging boosted Higgs bosons that is based on a combination of jet substructure information and b tagging.

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References in corpus (40)

• 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
• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The anti-k_t jet clustering algorithm
• FastJet user manual
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• MadGraph 5 : Going Beyond
• The Minimal Composite Higgs Model
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Electroweak symmetry breaking from dimensional deconstruction
• Better Jet Clustering Algorithms
• Jet substructure as a new Higgs search channel at the LHC
• Description and performance of track and primary-vertex reconstruction with the CMS tracker
• Determination of Jet Energy Calibration and Transverse Momentum Resolution in CMS
• The Catchment Area of Jets
• Jet Trimming
• Little Higgs Review
• Identification of b-quark jets with the CMS experiment
• Top-tagging: A Method for Identifying Boosted Hadronic Tops
• Jet substructure as a new Higgs search channel at the LHC
• A handbook of vector-like quarks: mixing and single production
• Techniques for improved heavy particle searches with jet substructure
• Finite Higgs mass without Supersymmetry
• Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at sqrt(s) = 7 TeV
• Measurement of differential top-quark pair production cross sections in pp collisions at sqrt(s) = 7 TeV
• Top Tagging
• Searches for new physics using the ttbar invariant mass distribution in pp collisions at sqrt(s)=8 TeV
• Search for anomalous t t-bar production in the highly-boosted all-hadronic final state
• Early LHC Underlying Event Data - Findings and Surprises
• Search for resonances decaying into top-quark pairs using fully hadronic decays in pp collisions with ATLAS at sqrt(s) = 7 TeV
• Dynamical Gauge-Higgs Unification in the Electroweak Theory
• Search for a Vector-like Quark with Charge 2/3 in t + Z Events from pp Collisions at sqrt(s) = 7 TeV
• Search for heavy, top-like quark pair production in the dilepton final state in pp collisions at sqrt(s) = 7 TeV
• Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation
• Higgs Discovery through Top-Partners using Jet Substructure

Cited by in corpus (40)

• Jet Substructure at the Large Hadron Collider: Experimental Review
• New Angles on Energy Correlation Functions
• Search for resonant t t-bar production in proton-proton collisions at sqrt(s) = 8 TeV
• New Vector-Like Fermions and Flavor Physics
• Search for vector-like charge 2/3 T quarks in proton-proton collisions at sqrt(s) = 8 TeV
• Vector-like Fermions and Higgs Effective Field Theory Revisited
• Novel signatures for vector-like quarks
• Electroweak Vacuum Stability and Diphoton Excess at 750 GeV
• Jet Substructure Studies with CMS Open Data
• Recursive Soft Drop
• Vector-like Singlet Quarks: a Roadmap
• Search for single production of vector-like quarks decaying into $Wb$ in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for single production of vector-like quarks decaying to a top quark and a W boson in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for single production of vector-like quarks decaying into $Wb$ in $pp$ collisions at $\sqrt{s}=$ 8 TeV with the ATLAS detector
• Standard Model Effective Field Theory: Integrating out Vector-Like Fermions
• Permutationless Many-Jet Event Reconstruction with Symmetry Preserving Attention Networks
• Flavor Cosmology: Dynamical Yukawas in the Froggatt-Nielsen Mechanism
• Search for single production of a vector-like $T$ quark decaying into a Higgs boson and top quark with fully hadronic final states using the ATLAS detector
• Top-philic Scalar Dark Matter with a Vector-like Fermionic Top Partner
• Jet Constituents for Deep Neural Network Based Top Quark Tagging
• Measurement of the jet mass in highly boosted t t-bar events from pp collisions at sqrt(s) = 8 TeV
• Top-Quark Physics: Status and Prospects
• Long Short-Term Memory (LSTM) networks with jet constituents for boosted top tagging at the LHC
• Search for single production of a heavy vector-like T quark decaying to a Higgs boson and a top quark with a lepton and jets in the final state
• Search for single production of vector-like quarks decaying to a Z boson and a top or a bottom quark in proton-proton collisions at sqrt(s) = 13 TeV
• A new tagger for hadronically decaying heavy particles at the LHC
• Search Strategies for TeV Scale Fermionic Top Partners with Charge 2/3
• Search for single production of a vector-like quark via a heavy gluon in the $4b$ final state with the ATLAS detector in $pp$ collisions at $\sqrt{s}=8$ TeV
• Vector-like Quarks at the Origin of Light Quark Masses and Mixing
• The Top Quark
• The Global Higgs as a Signal for Compositeness at the LHC
• Vacuum stability in the Standard Model with vector-like fermions
• Looking for a vectorlike B quark at LHC using jet substructure
• Single production of $X_{\pm 5/3}$ and $Y_{\mp 4/3}$ vectorlike quarks at the LHC
• Analytic Boosted Boson Discrimination
• Dreaming Awake: Disentangling the Underlying Physics in Case of a SUSY-like Discovery at the LHC
• Constraints from Triple Gauge Couplings on Vectorlike Leptons
• Naturalness from a Composite Top?
• The LHC as an Axion-Photon Collider
• Energy Flow in Particle Collisions