Seesaw Type I and III at the LHeC

TL;DR

This paper explores the potential of the LHeC collider to detect heavy Majorana neutrinos via lepton number violating processes, showing it can outperform the LHC in certain mass ranges.

Contribution

It demonstrates the feasibility of testing seesaw type I and III models at the LHeC, highlighting its advantages over the LHC for heavy neutrino detection.

Findings

Cross section for heavy neutrino production can reach a few fb at 1 TeV mass.

LHeC can probe higher heavy neutrino masses than the LHC.

Potential for observing lepton number violation at the LHeC.

Abstract

We study the potential of testing the seesaw type I and III models at the LHeC, an e-p collision mode at the CERN collider. The e-p collision mode provides an excellent place to study lepton number violating process e^- p \to N j + X \to l^+ W^- j + X with W^- into hadron jets. Here N is a heavy Majorana neutrino and j is a hard hadron jet. With the electron energy E_e = 140 GeV and proton energy E_p = 7 TeV, we find that the cross section for the heavy neutrino N production can be as large as a few fb for the mass scale as high as 1 TeV, higher than what can be achieved by the p-p collision mode of LHC with the same related heavy neutrino couplings.