NMSSM and Seesaw Physics at LHC

TL;DR

This paper explores extended NMSSM models incorporating higher-dimensional operators for neutrino mass generation, predicting new particles that could be detected at the LHC due to their sizable couplings.

Contribution

It introduces models with dimension six or seven operators for neutrino masses within NMSSM, highlighting potential collider signatures of new particles at TeV scales.

Findings

New particles with sizable couplings to leptons are possible at TeV scales.

Some of these particles could be produced and observed at the LHC.

Extended models respect the model's discrete symmetries.

Abstract

We consider extensions of the next-to-minimal supersymmetric model (NMSSM) in which the observed neutrino masses are described in terms of effective dimension six (or seven) rather than dimension five operators. All such operators respect the discrete symmetries of the model. The new particles associated with the double (or triple) seesaw mechanism can have sizable couplings to the known leptons, even with a TeV seesaw scale. In the latter case some of these new short-lived particles could be produced and detected at the LHC.