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

Abstract

We study the possibility of the LHeC facility to disentangle different new physics contributionsto the production of heavy sterile Majorana neutrinos in the lepton number violating channele−p → l+j + 3jets (lj ≡ e, µ). This is done investigating the angular and polarization trails ofeffective operators with distinct Dirac-Lorentz structure contributing to the Majorana neutrinoproduction, which parameterize new physics from a higher energy scale. We study an asymmetryin the angular distribution of the final anti-lepton and the initial electron polarization effect on thenumber of signal events produced by the vectorial and scalar effective interactions, finding bothanalyses could well separate their contributions.