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Finding Z' bosons coupled preferentially to the third family at CERN LEP and the Fermilab Tevatron
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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.
Forward citations
Cited by 2 Pith papers
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Search for a neutral gauge boson with nonuniversal fermion couplings in vector boson fusion processes in proton-proton collisions at $\sqrt{s}$ = 13 TeV
CMS finds no evidence for a VBF-produced Z' boson with nonuniversal fermion couplings and excludes masses up to 2.45 TeV (tau-tau) and 1.60 TeV (WW), assuming 50% branching fractions and maximal W coupling.
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Search for a new neutral gauge boson produced in association with one or two b jets and decaying into a pair of muons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
No Z' boson decaying to muon pairs and produced with b jets appears in 138 fb⁻¹ of CMS data, yielding first 95% CL limits of 0.2–2 fb on σ×B×A×ε across 125–350 GeV.
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