Minimal Z' models and the early LHC

TL;DR

This paper explores minimal Z' models extending the Standard Model, analyzing their theoretical parameter space, current experimental constraints, and the potential for discovery at the early LHC.

Contribution

It provides a comprehensive analysis of minimal Z' models, including both family-universal and non-universal cases, with an emphasis on early LHC discovery prospects.

Findings

Parameter ranges compatible with GUTs are identified.

Current bounds from electroweak tests and Tevatron searches are discussed.

Early LHC has significant discovery potential for Z' bosons.

Abstract

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.