A clean signal for a top-like isosinglet fermion at the Large Hadron Collider

Abstract

We predict a clean signal at the Large Hadron Collider ($\sqrt{s})$=14 TeV for a scenario where there is a top-like, charge +2/3 vectorlike isosinglet fermion. Such a quark, via mixing with the standard model top, can undergo decays via both flavour-changing Z-boson coupling and flavour-changing Yukawa interactions. We concentrate on the latter channel, and study the situation where, following its pair-production, the heavy quark pair gives rise to two tops and two Higgs boson. We show that the case where each Higgs decays in the $b\bar{b}$ channel, there can be a rather distinct and background-free signal that can unveil the existence of the vectorlike isosinglet quark of this kind.

14 pages, 5 figures, 4 tables

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Cited by in corpus (6)

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• Implications of gauge-mediated supersymmetry breaking with vector-like quarks and a ~125 GeV Higgs boson
• Towards the fate of natural composite Higgs model through single $t^{\prime }$ search at the 8 TeV LHC
• Reconstruction of Vector-like Top Partner from Fully Hadronic Final States
• Distinguishing Signatures of top-and bottom-type heavy vectorlike quarks at the LHC