Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 9: Search for Supersymmetry

T 9.4: Vortrag

Montag, 21. März 2022, 17:00–17:15, T-H22

Search for Elektroweak Production of Sleptons in Di-Lepton Final States with the ATLAS Detector — •Marian Rendel, Michael Holzbock, Hubert Kroha, and Sandra Kortner — Max-Planck-Institut für Physik (Werner-Heisenberg-Institut)

Supersymmetry (SUSY) is one of the best studied extensions of the Standard Model (SM) and as such a major part of the ATLAS physics program. SUSY scenarios with light scalar partners of the SM leptons (sleptons) and the neutralino as lightest SUSY particle (LSP) may address the observed muon g-2 anomaly, as well as provide a viable candidate for Dark Matter, and are thus of particular interest. The kinematic properties of final states in events with pair-produced sleptons primarily depend on the mass splitting (Δ m) between the sleptons and the LSP. Two complementary ATLAS searches targeting large and small mass splittings, respectively, have been published. However, there remains a sensitivity gap in the intermediate region of moderate mass splittings between 20 GeV and 60 GeV.

In this talk, a new search for sleptons in events with an electron or muon pair produced with an initial–state radiation jet, is presented which particularly aims at closing the sensitivity gap.

The design of the signal region and the background estimation strategies are introduced and the expected sensitivity using 139 fb⁻¹ LHC proton–proton collision data collected by the ATLAS experiment during the years of 2015 and 2018 is presented.