Search for pair produced fourth-generation up-type quarks in pp collisions at sqrt(s) = 7 TeV with a lepton in the final state

Abstract

The results of a search for the pair production of a fourth-generation up-type quark (t') in proton-proton collisions at sqrt(s) = 7 TeV are presented, using data corresponding to an integrated luminosity of about 5.0 inverse femtobarns collected by the Compact Muon Solenoid experiment at the LHC. The t' quark is assumed to decay exclusively to a W boson and a b quark. Events with a single isolated electron or muon, missing transverse momentum, and at least four hadronic jets, of which at least one must be identified as a b jet, are selected. No significant excess of events over standard model expectations is observed. Upper limits for the t' anti-t' production cross section at 95% confidence level are set as a function of t' mass, and t'-quark production for masses below 570 GeV is excluded. The search is equally sensitive to nonchiral heavy quarks decaying to Wb. In this case, the results can be interpreted as upper limits on the production cross section times the branching fraction to Wb.

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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
• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• The anti-k_t jet clustering algorithm
• Asymptotic formulae for likelihood-based tests of new physics
• 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
• Confidence Level Computation for Combining Searches with Small Statistics
• Dispelling the N^3 myth for the Kt jet-finder
• MadGraph/MadEvent v4: The New Web Generation
• Pileup subtraction using jet areas
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Determination of Jet Energy Calibration and Transverse Momentum Resolution in CMS
• The Catchment Area of Jets
• Four Generations and Higgs Physics
• Next-to-leading order corrections to W+2 jet and Z+2 jet production at hadron colliders
• Beautiful Mirrors and Precision Electroweak Data
• Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA
• Introducing the Little Higgs
• Less space for a new family of fermions
• SM with four generations: Selected implications for rare B and K decays
• Measurement of the t t-bar Production Cross Section in pp Collisions at 7 TeV in Lepton + Jets Events Using b-quark Jet Identification
• Search for heavy, top-like quark pair production in the dilepton final state in pp collisions at sqrt(s) = 7 TeV
• LHC Signatures of Two-Higgs-Doublets with Fourth Family
• Joint analysis of Higgs decays and electroweak precision observables in the Standard Model with a sequential fourth generation
• Search for pair production of a heavy up-type quark decaying to a W boson and a b quark in the lepton+jets channel with the ATLAS detector
• Search for a Heavy Top-Like Quark in p\bar{p} Collisions at {\surd}s = 1.96 TeV
• Once more on extra quark-lepton generations and precision measurements
• Search for a fourth generation t' quark in ppbar collisions at sqrt{s}=1.96 TeV

Cited by in corpus (41)

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• New-physics signals of a model with a vector-singlet up-type quark
• Combined search for the quarks of a sequential fourth generation
• Top Partners and Higgs Boson Production
• 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
• Heavy Vector-like quark with charge 5/3 at the LHC
• Towards the fate of natural composite Higgs model through single $t^{\prime }$ search at the 8 TeV LHC
• The Natural Composite Higgs
• Review of Central Exclusive Production of the Higgs Boson Beyond the Standard Model
• Exotic Top Partners and Little Higgs
• The production and decay of the top partner $T$ in the left-right twin higgs model at the ILC and CLIC
• Electroweak symmetry breaking and collider signatures in the next-to-minimal composite Higgs model
• Exclusive MSSM Higgs production at the LHC after Run I
• Fully hadronic decays of a singly produced vector-like top partner at the LHC
• Top Partner Probes of Extended Higgs Sectors
• The Higgs Boson is found: What is next?
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• Radiatively Induced Type II seesaw and Vector-like 5/3 Charge Quarks
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• Direct Constraints, Flavor Physics, and Flavor Anomalies in Composite Higgs Models
• Higgs boson production and decay at $e^{+}{e}^{-}$ colliders as a probe of the Left-Right twin Higgs model
• Vector Quarks in the Higgs Triplet Model
• Exotic colored scalars at the LHC
• Effective Higgs Theories in Supersymmetric Grand Unification
• Fourth generation Majorana neutrino, dark matter and Higgs physics
• Single Higgs boson production at the ILC in the left-right twin Higgs model
• Pair Production of New Heavy Leptons with $U(1{)}^{\prime }$ Charge at Linear Colliders
• Muon g-2 Anomaly confronted with the higgs global data in the Left-Right Twin Higgs Models
• Supersymmetry after the Higgs discovery and its LHC phenomenology
• Constraints on Majorana Dark Matter from a Fourth Lepton Family
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