Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 34: Extended Higgs models I

T 34.2: Vortrag

Dienstag, 16. März 2021, 16:15–16:30, Ti

Identification of highly boosted W and Z Bosons with the ATLAS detector — Johannes Balz, Volker Büscher, •Kira Köhler, Christian Schmitt, and Duc Bao Ta — Johannes Gutenberg-Universität Mainz

The ATLAS detector at the LHC is used for the search for invisible decays of the Higgs Boson beyond those predicted by the Standard Model in the associated production channel. The signature in this search is a high momentum large-area jet from the hadronically decaying W/Z recoiling against the invisible decay products of the Higgs Boson. The large-area jet can be distinguished from a background jet due to the particular structure given by the hadronic W/Z decays.

This identification is conventionally done by applying cuts on jet observables from the calorimeter. By using a Neural Network and additional observables from the high resolution tracking detector it was possible to significantly improve the identification of W/Z - jets with high transverse momenta in the multi-TeV region. This talk will give an overview of the new identification method and a comparison to the cut-based identification tool.