Abstract
Recently, Hill has proposed a model in which new, potentially low-energy, top-color interactions produce a top-condensate (a la Nambu-Jona-Lasinio) and accommodate a heavy top quark, while technicolor is responsible for producing the W and Z masses. Here we argue that isospin breaking gauge interactions, which are necessary in order to split the top and bottom quark masses, are likely to couple to technifermions. In this case they produce a significant shift in the W and Z masses (i.e. contribute to Δϱ∗ = αT) if the scale of the new interactions is near 1 TeV. In order to satisfy experimental constraints on Δϱ∗, we find that either the effective top quark coupling or the top-color coupling must be adjusted to 1%. Independent of the couplings of the technifermions, we show that the isospin-splitting of the top and bottom quarks implies that the top-color gauge bosons must have masses larger than about 1.4 TeV. Our analysis can also be applied to strong extended technicolor (ETC) models that produce the top-bottom splitting via isospin breaking ETC interactions.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
