Aachen 2019 – scientific programme

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T: Fachverband Teilchenphysik

T 36: Supersymmetrie I

T 36.9: Talk

Tuesday, March 26, 2019, 18:00–18:15, S11

Searches for τ-production with the ATLAS experiment — •Johannes Junggeburth, Hubert Kroha, and Zinonas Zinonos — Max-Planck Institut für Physik, München

The search for Supersymmetry is a broad topic of the ATLAS research programme. Direct τ pair production is a channel on which the last limits were put at the era of LEP. Once produced, the τ decays into a τ-lepton and a χ₁⁰. The latter is an ideal Dark Matter candidate and if the τ is light enough, it naturally explains the observed dark-matter abundance. However, τ reconstruction itself is very challenging due to the large QCD background, motivating to exploit the use of machine-learning techniques. This talk presents the search strategy for direct τ production where one τ decays into hadrons and other one leptonically using machine-learning techniques. The expected sensitivity in the LHC Run-2 dataset comprising 150 fb⁻¹ will be discussed and compared to a cut-based approach.