2000/01/31 by Marko B. Popović, Marko B. Popovic, Elizabeth H. Simmons
Physics and Astronomy · #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #hep-ph
paper · pdf · doi:10.1103/physrevd.62.035002
published as Phys.Rev. D62 (2000) 035002 · 29 pages, 12 figures; added 1 reference, expanded introduction
arxiv created 2000/02/09 · openalex publication_date 2000/06/19 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We employ data from precision electroweak tests and collider searches to derive constraints on the possibility that weak-singlet fermions mix with the ordinary standard model fermions. Our findings are presented within the context of a theory with weak-singlet partners for all ordinary fermions and theories in which only third-generation fermions mix with weak singlets. In addition, we indicate how our results can be applied more widely in theories containing exotic fermions.