SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 61: Higgs I

T 61.3: Vortrag

Mittwoch, 22. März 2023, 16:20–16:35, HSZ/0204

Multivariate techniques for measurements of Higgs boson production cross-sections in H→ WW^*→ eνµν decays with the ATLAS experiment — •Ahmed Markhoos, Karl Jakobs, Karsten Köneke, and Benedict Winter — University of Freiburg, Germany

The H→ WW^*→ eνµν channel provides a sizeable signal and moderate background yields, allowing for accurate measurements of the total and 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.

In this talk, Deep Neural Network models (DNN) are showcased as powerful tools in tackling this complex but highly sensitive channel. Enhancing the signal purity with respect to the current cut-based selection method, reduces systematic uncertainties from backgrounds and statistical uncertainties, as well as enables measurements of simplified template cross-sections with finer granularity. Additionally, DNNs facilitate the difficult measurement of vector boson fusion in the single jet channel.