A handbook of vector-like quarks: mixing and single production

2013/06/30 by J. A. Aguilar-Saavedra, R. Benbrik, S. Heinemeyer +1 · 3 citations
Physics and Astronomy · #hep-ph #hep-ex

paper · pdf · doi:10.1103/physrevd.88.094010

published as Phys. Rev. D 88, 094010 (2013) · LaTeX 36 pages. Minor changes and references added, version in PRD

arxiv created 2013/12/07 · arxiv updated 2013/12/10

Abstract

We obtain constraints on the mixing of vector-like quarks coupling predominantly to the third generation. We consider all (seven) relevant types of vector-like quarks, individually. The constraints are derived from oblique corrections and Z -> b bbar measurements at LEP and SLC. We investigate the implications of these constraints on LHC phenomenology, concerning the decays of the heavy quarks and their single production. We also explore indirect effects of heavy quark mixing in top and bottom couplings. A remarkable effect is the possibility of explaining the anomalous forward-backward asymmetry in Z -> b bbar at LEP, with a hypercharge -5/6 doublet. We also study the impact of the new quarks on single Higgs production at the LHC and Higgs decay.

Cited by

• Up-type FCNC in presence of Dark Matter
• Search for the single production of vector-like quarks decaying into a W boson and a b quark using single-lepton final states in proton-proton collisions at √(s) = 13 TeV
• Search for a new heavy resonance decaying to a top quark and a neutral scalar boson in proton-proton collisions at √(s) = 13 TeV

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• LHC signatures of vector-like quarks
• Sensitivity to the Single Production of Vector-Like Quarks at an Upgraded Large Hadron Collider
• Interpretation of vector-like quark searches: the case of a heavy gluon in composite Higgs models and vector-like quarks
• Quark masses and mixings in the standard model with heavy vector-like families
• Investigating the Single Production of Vector-Like Quarks Decaying into Top Quark and W Boson through Hadronic Channels at the HL-LHC