Quentin Buat, ATLAS, University of Washington

"Higgs boson measurements with tau leptons at ATLAS"

Abstract: Since the discovery of the Higgs boson, ATLAS and CMS have been exploring its interactions with increasing precision. In this talk, I will present a recent ATLAS result on Higgs boson measurements with tau leptons. Hadronic decays of the tau lepton occur almost twice as often as leptonic ones and carry more information about the properties of the particle from which the tau lepton originates. As such, the hadronic tau leptons play a key role in the Higgs measurement. In this talk, I will discuss the strategy of the analysis, the main results and its long term prospects with the upcoming data-taking planned with the LHC. I will also discuss the strategy employed by the ATLAS experiment to detect, characterize and calibrate hadronic tau leptons. I will review the modern machine learning algorithms employed to distinguish tau leptons from QCD jets and identify their decay products and discuss the role of these algorithms in the Higgs measurement program.