Phenomenology of minimal Z' models: from the LHC to the GUT scale

TL;DR

This paper explores minimal Z' models extending the Standard Model, analyzing their collider signatures at the LHC and their high-energy behavior within GUT frameworks, highlighting unique decay channels and theoretical consistency.

Contribution

It provides a detailed phenomenological analysis of minimal Z' models, including collider signatures and high-energy behavior within GUT scenarios, which is a novel comprehensive approach.

Findings

Z' decays to heavy neutrino pairs at the LHC

Heavy scalar decays to two Higgs bosons

Constraints from GUT embedding on model parameters

Abstract

We consider a class of minimal abelian extensions of the Standard Model with an extra neutral gauge boson $Z'$ at the TeV scale. In these scenarios an extended scalar sector and heavy right-handed neutrinos are naturally envisaged. We present some of their striking signatures at the Large Hadron Collider, the most interesting arising from a $Z'$ decaying to heavy neutrino pairs as well as a heavy scalar decaying to two Standard Model Higgses. Using renormalisation group methods, we characterise the high energy behaviours of these extensions and exploit the constraints imposed by the embedding into a wider GUT scenario.