Probing Left-handed Heavy Neutral Leptons on the Massive Vector Doublet Model

TL;DR

This paper investigates a theoretical extension of the Standard Model involving a Massive Vector Doublet and Left-handed Heavy Neutral Leptons, analyzing their production, setting experimental limits, and exploring dark matter implications at the LHC.

Contribution

It introduces a novel model extension with detailed analysis of production channels, experimental limits, and dark matter candidate viability.

Findings

Established limits on model parameters from existing searches

Modified event selection criteria to enhance detection prospects

Identified parameter regions where the new lepton could be dark matter

Abstract

In the first part of this thesis, we consider an extension to the Standard Model composed by a Massive Vector Doublet under SU(2)L and a Left-handed Heavy Neutral Lepton. We study the production of these exotic leptons with a Same Flavor Opposite Sign standard lepton pair, and jets. We establish limits on the parameter space considering previous searches in this final state. After the limit definition, we study a modification on the event selection criteria in order to increase the possibility of probing these new particles at the Large Hadron Collider. Finally, we perform a parameter scan considering the new lepton as a dark matter candidate, identifying relevant regions on the parameter space for future studies.