Heavy neutrinos, Z' and Higgs bosons at the LHC: new particles from an old symmetry

TL;DR

This paper discusses an extension of the Standard Model with an extra U(1) symmetry, predicting new particles like heavy neutrinos, Z' gauge bosons, and Higgs bosons, which can be tested at the LHC and related experiments.

Contribution

It introduces a B-L extended model incorporating supersymmetry, providing testable predictions for new particles and a dark matter candidate, addressing neutrino masses and model flaws.

Findings

LHC can probe heavy neutrinos, Z' bosons, and Higgs from the model

Supersymmetric extension offers additional benefits and dark matter candidate

Model predictions are testable at current collider energies

Abstract

A new era in particle physics is being spurred on by new data from the Large Hadron Collider. Non-vanishing neutrino masses represent firm observational evidence of new physics beyond the Standard Model. An extension of the latter, based on a SU(3)_C x SU(2)_L x U(1)_Y x U(1)_{B-L} symmetry, incorporating an established Baryon minus Lepton number invariance, is proposed as a viable and testable solution to the neutrino mass problem. We argue that LHC data will probe all the new content of this model: heavy neutrinos, an extra gauge boson emerging from spontaneous breaking of the additional gauge group at the TeV scale, onset by a new heavier Higgs boson, also visible at the CERN proton-proton collider. An even more exciting version of this model is the one exploiting Supersymmetry: firstly, it incorporates all its well known benefits; secondly, it alleviates the flaws of its more minimal realisations. Finally, this model provides a credible cold Dark Matter candidate, the lightest sneutrino, detectable in both underground and collider experiments.