Minimal Z' models and the early LHC

Understand

We consider a class of minimal extensions of the Standard Model with an extra massive neutral gauge boson Z'.

• They include both family-universal models, where the extra U(1) is associated with (B-L), and non-universal models where the Z' is coupled to a non-trivial linear combination of B and the lepton flavours.
• After giving an estimate of the range of parameters compatible with a Grand Unified Theory, we present the current experimental bounds, discussing the interplay between electroweak precision tests and direct searches at the Tevatron.
• Finally, we assess the discovery potential of the early LHC.