Search for Right-Handed Neutrinos and Weak Bosons at CMS with the LHC at √s = 13 TeV and an integrated luminosity of 137 fbᐨ¹

Abstract

This thesis presents the most expansive limits on the WR decay to two muons or electrons, and two jets at CMS. Left-right symmetric extensions to the Standard Model are motivated and presented giving rise to the purpose of this search. New techniques in boosted jet reconstruction are employed to expand past analytical approaches to now include much lighter NR hypotheses. With a larger signal acceptance compared to previous analyses, a new signal selection strategy is developed and explained. Then, standard model backgrounds for this analysis are discussed and estimated using several control regions. Data collected by the CMS collaboration over three years of Run II for a total of 137 fbᐨ¹ is combined and limits are set on the WR mass at 4-5 TeV and 4-5.5 TeV for the electron and muon flavor search respectively for NR masses ranging between 100-3000 GeV.