Search for New Neutral Bosons at Future Colliders
F. del Aguila, M. Masip, M. Perez-Victoria
Abstract
This is a short review of present and future limits on new neutral gauge bosons, in particular on hadrophilic or leptophobic Z's recently proposed to interpret the observed fluctuations of Γc,b at LEP. Light gauge bosons coupled to lepton number differences or to baryon number are also examples of the model dependence of these bounds. The mixing between the U(1) factors plays an important role in the phenomenology of these extended electroweak models. Future improvements based on the analysis of precise electroweak data are emphasized.
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