Regular Article - Theoretical Physics
Signals of universality violation in e+e- collisions
Department of Physics, Umm Al-Qura University, Makkah, Saudi Arabia
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Revised: 22 January 2008
Published online: 8 March 2008
We examine distributions of leptons produced in e+e- collisions, by a family nonuniversal extra gauge boson Z′, suggested by the model, and by other neutral gauge bosons occurring in left–right symmetric models and in superstring-inspired E6 models. We discuss how to distinguish the models by examining the couplings to fermions of the extra Z-boson through its leptonic production cross sections and asymmetries. We show how the universality violation inherent in the model enhances the discovery potential of Z′ at future planned and proposed e+e- colliders.
© Springer-Verlag / Società Italiana di Fisica, 2008