Finding Z' bosons coupled preferentially to the third family at CERN LEP and the Fermilab Tevatron

Details Finding Z' bosons coupled preferentially to the third family at CERN LEP and the Fermilab Tevatron Finding Z' bosons coupled preferentially to the third family at CERN LEP and the Fermilab Tevatron

2000-07-25

arxiv.org/abs/hep-ph/0007286v5

Phys.Rev.D63:035006,2001

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTeX2e, 24 pages (including title page), 13 figures; version 2: corrected typographical errors and bad figure placement; vers

Scientific paper

10.1103/PhysRevD.63.035006

Z' bosons that couple preferentially to the third generation fermions can arise in models with extended weak (SU(2)xSU(2)) or hypercharge (U(1)xU(1)) gauge groups. We show that existing limits on quark-lepton compositeness set by the LEP and Tevatron experiments translate into lower bounds of order a few hundred GeV on the masses of these Z' bosons. Resonances of this mass can be directly produced at the Tevatron. Accordingly, we explore in detail the limits that can be set at Run II using the process p pbar -> Z' -> tau tau -> e mu. We also comment on the possibility of using hadronically-decaying taus to improve the limits.

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