Dropping renormalizability in effective theories of vector-like quarks opens five new multiplet types whose widths can be so suppressed that the quarks become long-lived R-hadrons at the LHC.
Top Partners Searches and Composite Higgs Models
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abstract
Colored fermionic partners of the top quark are well-known signatures of the Composite Higgs scenario and for this reason they have been and will be subject of an intensive experimental study at the LHC. Performing an assessment of the theoretical implications of this experimental effort is the goal of the present paper. We proceed by analyzing a set of simple benchmark models, characterized by simple two-dimensional parameter spaces where the results of the searches are conveniently visualized and their impact quantified. We only draw exclusion contours, in the hypothesis of no signal, but of course our formalism could equally well be used to report discoveries in a theoretically useful format.
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Vector-like quarks with non-renormalizable interactions
Dropping renormalizability in effective theories of vector-like quarks opens five new multiplet types whose widths can be so suppressed that the quarks become long-lived R-hadrons at the LHC.