Probing the Heavy Neutrinos of Inverse Seesaw Model at the LHeC

TL;DR

This paper explores the potential of the future LHeC collider to detect heavy neutrinos predicted by the inverse seesaw model, highlighting its advantages over the LHC in probing new leptonic states with polarized electron beams.

Contribution

It demonstrates that the LHeC can effectively probe inverse seesaw heavy neutrinos, surpassing the LHC's capabilities with minimal luminosity and utilizing electron beam polarization.

Findings

LHeC can detect heavy neutrinos more effectively than LHC.

Polarized electron beams enhance heavy neutrino production.

LHeC requires lower luminosity for similar or better sensitivity.

Abstract

We consider the production of a heavy neutrino and its possible signals at the Large Hadron-electron Collider (LHeC) in the context of an inverse-seesaw model for neutrino mass generation. The inverse seesaw model extends the Standard Model (SM) particle content by adding two neutral singlet fermions for each lepton generation. It is a well motivated model in the context of generating non-zero neutrino masses and mixings. The proposed future LHeC machine presents us with a particularly interesting possibility to probe such extensions of the SM with new leptons due to the presence of an electron beam in the initial state. We show that the LHeC will be able to probe an inverse scenario with much better efficacy compared to the LHC with very nominal integrated luminosities as well as exploit the advantage of having the electron beam polarized to enhance the heavy neutrino production rates.