Search for heavy right-handed gauge bosons decaying into boosted heavy neutrinos with the ATLAS detector at √s = 13 TeV

Several beyond Standard Model theories exist that predict the existence of the heavy neutrinos at TeV scale, thus discoverable at the LHC, in order to explain the light neutrino masses. In Type I seesaw mechanism the heavy neutrinos are introduced as at least two fermionic singlets, where as in case of Type III seesaw mechanism they are introduced with additional fermionic triplets. Type I seesaw mechanism can be further embedded into the Left-Right Symmetric Model, which restores the parity symmetry at a high energy scale by introducing heavy neutrinos as the right handed parity gauge partners of the corresponding left handed neutrino fields. The more is the energy of the LHC the stronger is the motivation to explore the possibility for the existence of such heavy neutrinos in a high momentum phase space. If the mass ratio between the neutrino and the right handed gauge boson is significantly low it gives rise to an unusual topology with a large radius jet having a hard lepton inside as a proxy for the heavy neutrino. Searches for such high momentum heavy neutrino along with the future prospect of expanding the phase space with the ATLAS detector will be presented using proton-proton data from the LHC at a center-of-mass energy of 13 TeV.