Heavy Vector-like quark with charge 5/3 at the LHC

Abstract

We study the phenomenology at the Large Hadron Collider of an exotic vector-like quark X with charge +5/3. We relax the assumption of a 100% branching into W t and allow for an arbitrary rate into W plus light quarks, thus covering all possible scenarios. Sizeable decays into light quarks can be achieved, for instance, in a model where the X quark is embedded in a doublet with hypercharge 7/6, which also contains a t' quark. We study the bounds on the parameter space of this model, and perform a detailed simulation of the X pair production and decays. We show that the final state with W t W q, where q=u or c, contributes to the same sign dilepton searches, and that the reach can be improved with alternative cuts optimised on such final state.

21 pages, 8 figures, 6 tables. Added references and an estimate of the reach of the analysis at 8 TeV

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Cited by in corpus (24)

• Composite Higgses
• Light top partners and precision physics
• Higgs singlet boson as a diphoton resonance in a vector-like quark model
• LHC Signatures of Warped-space Vectorlike Quarks
• Boosting Top Partner Searches in Composite Higgs Models
• Vector-like top/bottom quark partners and Higgs physics at the LHC
• Gravity particles from Warped Extra Dimensions, predictions for LHC
• The Excitation of the Global Symmetry-Breaking Vacuum in Composite Higgs Models
• 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
• XQCAT: eXtra Quark Combined Analysis Tool
• E6 inspired composite Higgs model
• Fully hadronic decays of a singly produced vector-like top partner at the LHC
• Heavy vector-like quarks decaying to exotic scalars: a case study with triplets
• Radiatively Induced Type II seesaw and Vector-like 5/3 Charge Quarks
• Single production of $X_{\pm 5/3}$ and $Y_{\mp 4/3}$ vectorlike quarks at the LHC
• LHC signatures of neutral pseudo-Goldstone boson in the E6CHM
• Diboson excess in the Higgs singlet and vector-like quark models
• Baryon asymmetry generation in the E6CHM
• Status and Implications of BSM Searches at the LHC
• Loop induced singlet scalar production through the vector like top quark at future lepton colliders
• Heavy Higgs Coupled to Vector-like Quarks: Strong CP Problem and Search Prospects at the 14 TeV LHC
• A Model with Chiral Quarks of Electric Charges -4/3 and 5/3
• Searching for single production of vectorlike quarks decaying into Wb at a future muon-proton collider
• Vector-like quarks decaying into singly and doubly charged bosons at LHC