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2009

Non-universal minimal Z' models: present bounds and early LHC reach

Salvioni, Ennio, Strumia, Alessandro, Villadoro, Giovanni et al.

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We consider non-universal 'minimal' Z' models, whose additional U(1) charge is a non-anomalous linear combination of the weak hypercharge Y, the baryon number B and the partial lepton numbers (L_e, L_mu, L_tau), with no exotic fermions beyond three standard families with right-handed neutrinos.

We show that the observed pattern of neutrino masses and mixing can be fully reproduced by a gauge-invariant renormalizable Lagrangian, and flavor-changing neutral currents in the charged lepton sector are suppressed by a GIM mechanism.
We then discuss the phenomenology of some benchmark models.
The electrophilic B-3L_e model is significantly constrained by electroweak precision tests, but still allows to fit the hint of an excess observed by CDF in dielectrons but not in dimuons.

Non-universal minimal Z' models: present bounds and early LHC reach · Around

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