Angular and polarization trails from effective interactions of Majorana neutrinos at the LHeC

TL;DR

This paper investigates how the LHeC collider can distinguish different new physics effects in heavy Majorana neutrino production by analyzing angular and polarization signatures, revealing potential methods to identify underlying interactions.

Contribution

It introduces a novel approach to differentiate effective operators with distinct Lorentz structures through angular and polarization asymmetries in Majorana neutrino production at the LHeC.

Findings

Angular asymmetry helps distinguish vectorial from scalar interactions.

Electron polarization enhances the separation of different operator contributions.

Analysis indicates feasible identification of new physics signatures.

Abstract

We study the possibility of the LHeC facility to disentangle different new physics contributions to the production of heavy sterile Majorana neutrinos in the lepton number violating channel $e^{-}p\rightarrow l_{j}^{+} + 3 jets$ ($l_j\equiv e ,\mu $). This is done investigating the angular and polarization trails of effective operators with distinct Dirac-Lorentz structure contributing to the Majorana neutrino production, which parameterize new physics from a higher energy scale. We study an asymmetry in the angular distribution of the final anti-lepton and the initial electron polarization effect on the number of signal events produced by the vectorial and scalar effective interactions, finding both analyses could well separate their contributions.