Searching for heavy neutrinos with the MoEDAL-MAPP detector at the LHC

• Main Authors: Mariana Frank, Marc de Montigny, Pierre-Philippe A. Ouimet, James Pinfold, Ameir Shaa, Michael Staelens
• Format: Article
• Language: English
• Published: Elsevier 2020-03-01
• Series: Physics Letters B
• Online Access: http://www.sciencedirect.com/science/article/pii/S0370269320300083
• ISSN: 0370-2693

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. Keywords: Heavy neutrino, Electric dipole moment, Heavy lepton, LHC, MilliQan, MoEDAL