Lepton Number Violation and W' Chiral Couplings at the LHC

TL;DR

This paper explores how to detect and distinguish properties of a heavy Majorana neutrino and a W' boson at the LHC through their unique production and decay signatures, including lepton-number violation and angular distributions.

Contribution

It introduces methods to verify the Majorana nature of N and determine the W' chiral couplings using angular distributions and lepton-number violating processes.

Findings

Majorana neutrino N can be identified via like-sign dilepton signals.

Chirality of W' couplings can be inferred from angular distributions.

Angular analysis helps distinguish W' chiral structures.

Abstract

We study the observability for a heavy Majorana neutrino N along with a new charged gauge boson W' at the LHC. We emphasize the complementarity of these two particles in their production and decay to unambiguously determine their properties. We show that the Majorana nature of N can be verified by the lepton-number violating like-sign dilepton process, and by polar and azimuthal angular distributions. The chirality of the W' coupling to leptons and to quarks can be determined by a polar angle distribution in the reconstructed frame and an azimuthal angle distribution.