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Brendon Aurele Bullard (Harvard) “Toward Precision Measurements of the Higgs Yukawa Couplings”
December 2, 2021 @ 4:00 pm - 5:00 pm
Abstract:
With the discovery of the Higgs boson in 2012, high energy physics has entered an era in which all fundamental particles predicted by the Standard Model have been observed. With no conclusive observations of physics beyond the Standard Model, precision tests of the properties of the Higgs boson are key to find indications of new physics. I will discuss the program of precision measurements of the Higgs Yukawa coupling strengths with the ATLAS experiment, focusing on those of the muon and top quark. I will give an overview of the search for Higgs decays in the dimuon channel with an emphasis on the novel use of quark/gluon tagging in an ATLAS Higgs measurement. Secondly, I will present the status and outlook for the joint measurement of ttW and ttH production in multi-lepton final states with an emphasis on ttW modeling, fake lepton estimation, and profile-likelihood unfolding. Finally, I will discuss the importance of the High Luminosity LHC for these physics goals in terms of sensitivity projections and the extension of tracking instrumentation provided by the ATLAS ITk upgrade.
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