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

¹ School of Physics and Astronomy, University of Southampton, Highfield, Southampton SO17 1BJ, UK
² Dipartimento di Matematica e Fisica Ennio De Giorgi, Università del Salento and INFN-Lecce, Via Arnesano 73100 Lecce, IT
³ Dept. of Particle Physics, Rutherford Appleton Laboratory, Chilton, Didcot OX11 0QX, UK

^* e-mail: e.accomando@soton.ac.uk
^** e-mail: claudio.coriano@le.infn.it
^*** Speaker. e-mail: l.delle-rose@soton.ac.uk
^**** e-mail: juri.fiaschi@soton.ac.uk
^† e-mail: carlo.marzo@le.infn.it
^‡ e-mail: s.moretti@soton.ac.uk

Published online: 25 November 2016

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.