Search for Heavy Higgs Bosons Decaying to Top Quark Pairs Using the CMS Experiment

DASHH Doctoral Researcher: Jonas Rübenach

Supervisors: Prof. Christian Schwanenberger (DESY, UHH), Dr. Alexander Grohsjean (DESY), Dr. Christian Seifert (TUHH)

The discovery of the Higgs boson at the Large Hadron Collider in 2012 marked a major breakthrough for particle physics, as it is the first step in verifying the Higgs mechanism, a central building block of the standard model (SM) of particle physics. However, the SM still lacks explanation for many phenomena we observe throughout the Universe, including dark matter. A great number of proposed extensions of the SM that remedy such shortcomings involve the existence of additional Higgs bosons, which is searched for in this project analyzing top-antitop quark (ttbar) final states. Methods of deep learning and attribute learning are utilized to significantly improve the reconstruction of the top quark system, constructing a deep neural network (DNN) algorithm.

PhD Thesis