Search for top quark partners with charge 5/3 in the same-sign dilepton and single-lepton final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Abstract

A search for the pair production of heavy fermionic partners of the top quark with charge 5/3 (X${}_{5/3}$) is performed in proton-proton collisions at a center-of-mass energy of 13 TeV with the CMS detector at the CERN LHC. The data sample analyzed corresponds to an integrated luminosity of 35.9 fb${}^{-1}$. The X${}_{5/3}$ quark is assumed always to decay into a top quark and a W boson. Both the right-handed and left-handed X${}_{5/3}$ couplings to the W boson are considered. Final states with either a pair of same-sign leptons or a single lepton are studied. No significant excess of events is observed above the expected standard model background. Lower limits at 95% confidence level on the X${}_{5/3}$ quark mass are set at 1.33 and 1.30 TeV respectively for the case of right-handed and left-handed couplings to W bosons in a combination of the same-sign dilepton and single-lepton final states.

Replaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/B2G-17-014 (CMS Public Pages)

References in corpus (19)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Particle-flow reconstruction and global event description with the CMS detector
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• Pileup subtraction using jet areas
• The CMS trigger system
• Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
• The Catchment Area of Jets
• Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
• Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• Techniques for improved heavy particle searches with jet substructure
• Measurement of the inelastic proton-proton cross section at $\sqrt{s}=$ 13 TeV
• Combination of the searches for pair-produced vector-like partners of the third-generation quarks at $\sqrt{s}=$ 13 TeV with the ATLAS detector
• Search for new physics with same-sign isolated dilepton events with jets and missing transverse energy
• Search for new phenomena in events with same-charge leptons and $b$-jets in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for pair production of heavy vector-like quarks decaying into high-$p_T$ $W$ bosons and top quarks in the lepton-plus-jets final state in $pp$ collisions at $\sqrt{s}$=13 TeV with the ATLAS detector

Cited by in corpus (17)

• Prospects for vectorlike leptons at future proton-proton colliders
• No Cauchy Horizon Theorem for Nonlinear Electrodynamics Black Holes with Charged Scalar Hairs
• Interpreting the $W$-mass anomaly in the vectorlike quark models
• Composite Dynamics in the Early Universe
• Exotic Vector-Like Quark Phenomenology in the Minimal Linear $\sigma$ Model
• Continuum Naturalness
• Phenomenology of unusual top partners in composite Higgs models
• Exotic decays of top partners with charge 5/3: bounds and opportunities
• Vector-like quarks: status and new directions at the LHC
• Two-loop splitting in double parton distributions
• Sum rule improved double parton distributions in position space
• Neutral-naturalness from a holographic SO(6)/SO(5) composite Higgs model
• Electroweak Top Couplings, Partial Compositeness and Top Partner Searches
• Origin of the VEVs hierarchy
• Evolution and interpolation of double parton distributions using Chebyshev grids
• Softly shifting away from dark matter direct detection
• Vector-Like top quark production via a chromo-magnetic moment at the LHC