Analysis of the tthh process in the ditau channel with CMS Data.

This work studies the production of a pair top-antitop together with a pair of Higgs bosons in proton-proton collisions at a center of mass energy of 13 TeV. It uses data collected in 2018 at CMS experiment, with an integrated luminosity of L = 59.8 fb−1. We study the channel in which one of the Higgs decays to a pair of hadronic tau-antitau leptons, while the other Higgs decays to a pair of b-quarks. In order to perform the best jet-tagging, two different novel methods have been compared. The frist one uses a combination of DeepTau and DeepJet algorithms in a cut-based analysis, while the second one is based on training an event-level ParticleNet to separate signal from backgrounds by using properties of the jet and lepton. The obtained significance for the first method was 0.007 while for the second one is 0.011, providing a better result.