"Shining a Light (or Two)" on the Higgs Boson with the ATLAS Detector

by Rachel Jordan Hyneman (Univ. of Michigan)

Thursday 17 Oct 2019, 12:30 → 13:30 America/Los_Angeles

48/2-224 - Madrone (SLAC)

The discovery of the Higgs Boson in 2012 has been followed by an immense body of research into the characteristics of this new particle. The diphoton decay channel offers a particularly attractive opportunity to examine the Higgs Boson in detail, given the excellent energy resolution of the ATLAS electromagnetic calorimeter. However, after collecting the full Run 2 data set, many Higgs Boson measurements are now at the point of being systematically limited, rather than statistically limited. I will give an overview of the Higgs Boson Couplings analysis in the diphoton channel, with a special focus on the recently observed top-associated production mode. I will then cover a number of approaches to reducing systematic uncertainties in this analysis and beyond, with particular emphasis on the use of Gaussian Processes, a machine learning technique uncommon within ATLAS.