Searching for Heavy Neutrinos with the MoEDAL-MAPP Detector at the LHC

TL;DR

This paper proposes a novel method to search for heavy neutrinos at the LHC using the MoEDAL-MAPP detector, focusing on detecting their electric dipole moments through ionization signals.

Contribution

It introduces a new search strategy for heavy neutrinos involving their EDM and fractional charge detection at MoEDAL-MAPP, expanding experimental approaches.

Findings

Potential to detect heavy neutrinos with EDM up to 10^{-15} e cm

Demonstrates sensitivity of MoEDAL-MAPP to fractional charge particles

Proposes a new signature for heavy neutrino detection at LHC

Abstract

We present a strategy for searching for heavy neutrinos at the Large Hadron Collider using the MoEDAL Experiment's MAPP detector. We hypothesize the heavy neutrino to be a member of a fourth generation lepton doublet, with the electric dipole moment (EDM) introduced within a dimension-five operator. In this model the heavy neutrino is produced in association with a heavy lepton. According to our current experimental and theoretical understanding, the electric dipole moment of this heavy neutrino may be as high as $10^{-15}$ $e$ cm. Taking advantage of the sensitivity of MoEDAL detector, we examine the possibility of detecting such a heavy neutrino in the MAPP as an apparently fractionally charged particle, via ionization due to the neutrino's EDM.