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T: Fachverband Teilchenphysik

T 61: Higgs Boson: Decay in Bosons

T 61.3: Vortrag

Mittwoch, 23. März 2022, 16:45–17:00, T-H20

Multivariate Techniques for Measurement of Higgs Bosons in H→ WW^*→ eνµν Decays at ATLAS — •Ahmed Markhoos, Benedict Winter, and Karsten Köneke — University of Freiburg

Since its discovery, the Higgs Boson has been studied in detail at the LHC. The H→ WW^*→ eνµν channel offers sizeable signal and moderate background yields enabling accurate measurements of the total cross-section and of differential cross-sections. The measurements for gluon-fusion production are generally dominated by systematic uncertainties except in the sparsely populated regions of the phase space such as at large transverse momenta.

The talk showcases deep neural networks (DNN) that can enhance the signal purity with respect to the current cut-based selection reducing systematic uncertainties from backgrounds and statistical uncertainties. Additionally, a regression DNN is presented that determines the Higgs Boson transverse momentum, which is elusive due to the presence of neutrinos, and required to measure simplified template cross-sections (STXS).