Searching for Heavy Neutral Lepton in the νMSM : 2 leptons 2 quarks Channel

The Neutrino Minimal Standard Model (νMSM) is an extension of the Standard Model of particle physics, by the addition of three right-handed neutrinos with masses smaller than the electroweak scale. This model introduces the smallest possible number of new particles without adding any new physical principles (such as supersymmetry or extra dimensions) or new energy scales (like the Grand Unified Scale) [2]. A Heavy Neutral lepton (HNL) can be produced only by mixing with an active neutrino. Plus, it can be either a Majorana or a Dirac particle. In case of Majorana nature, the HNL decays can lead to a very clean signature in the CMS detector containing LNV process.