Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 93: Search for New Particles 6

T 93.2: Vortrag

Donnerstag, 24. März 2022, 16:30–16:45, T-H24

Searching for Jet Pairs with Anomalous Substructure in CMS — Gregor Kasieczka, Louis Moureaux, Tobias Quadfasel, and •Manuel Sommerhalder — Institut für Experimentalphysik, Universität Hamburg

Despite compelling experimental and theoretical motivation as well as extensive new physics searches at the Large Hadron Collider, there have been no discoveries of physics beyond the standard model (BSM) so far. One potential reason for this is that the common search strategy relies on selecting BSM signal candidate events based on specific signal and background models. Such a dedicated search cannot be performed for every possible BSM theory and phase space region. Thus, model-independent anomaly detection methods are an important addition to existing search methods. These algorithms aim to select signal candidates in a data-driven manner based on anomalous phase space signatures.

One such anomaly detection method is CATHODE. It detects resonant signal peaks by combining neural density estimation in a sideband region with a weakly supervised classification task of disinguishing real data from synthetic background-like samples. We present the first application of CATHODE in a search for BSM physics in the CMS experiment targeting a dijet final state.