Exotic vectorlike quark phenomenology in the minimal linear σ model

J. A. Aguilar–Saavedra, J. Alonso-González, L. Merlo, J. M. No
2020 Physical Review D  
Extensions of the Standard Model that include vectorlike quarks commonly also include additional particles that may mediate new production or decay modes. Using the minimal linear σ model as an example, which reduces to the minimal SOð5Þ=SOð4Þ composite Higgs model in a specific limit, we consider the phenomenology of vectorlike quarks when a scalar singlet σ is present. This new particle may be produced in the decays T → tσ, B → bσ, where T and B are vectorlike quarks of charges 2=3 and −1=3,
more » ... espectively, with the subsequent decay σ → W þ W − , ZZ, hh. By scanning over the allowed parameter space we find that these decays may be dominant. In addition, we find that the presence of several new particles allows for single T production cross sections larger than those expected in minimal models. We discuss the observability of these new signatures in existing searches.
doi:10.1103/physrevd.101.035015 fatcat:ixjuoakmmvhfbasxokly6d425q