Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 35: Higgs Boson: Associated Production 1

T 35.1: Vortrag

Dienstag, 22. März 2022, 16:15–16:30, T-H20

Higgs Boson Mass Reconstruction in the ttH Multi-lepton Channel Using ATLAS data — Igor Boyko¹, •Adam Herold², Nazim Huseynov¹, Jan Kybic², André Sopczak², Petr Urban², and Cyrus Walther³ — ¹JINR Dubna — ²CTU in Prague — ³TU Dortmund

This study deals with the reconstruction of the Higgs boson mass in the 2lSS + 1τ_had channel in ttH production. Based on the reconstructed mass, the goal is to separate the signal from background productions such as the ttZ production. The data created by the full ATLAS detector simulation are used to develop two neural networks. First, a classification neural network that organizes the data by assigning detected particles to corresponding positions in the channel. Second, a regression neural network that reconstructs the mass of the Higgs boson. The developed neural network is tested and is shown to outperform the Missing Mass Calculator technique.