Abstract
We consider model-independent constraints on the fourth-generation fermion masses and the magnitude of the D-term contribution to the scalar masses. We find that the ratio of vacuum expectation values is limited to the range 1 5 ≲ |ν 2/ν 1| ≲ 4.5 . We compute the mass spectrum in the class of models where the only source of soft supersymmetry breaking is the gaugino mass m 1 2 . The lightest charged scalar turns out to be the fourth-generation slepton, which may be ligth enough to be pair-produced at LEP. The present PETRA bound on new charged particles implies that m 1 2 ≳ 150 GeV . A general feature of the four-generation models is thus a heavy spectrum of sparticles.
Sign-in/Register to access full text options 
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.
