Bonn 2020 – scientific programme

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T: Fachverband Teilchenphysik

T 94: Supersymmetry: Searches

T 94.5: Talk

Friday, April 3, 2020, 12:00–12:15, H-HS V

Searches for sleptons with semi-compressed mass spectra using the ATLAS detector at √s = 13 TeV — •Jorge Sabater Iglesias for the ATLAS collaboration — DESY, Hamburg

Supersymmetry (SUSY) is a symmetry that introduces a relation between every Standard Model (SM) particle with a superpartner state whose spin differs by half a unit. This provides an elegant solution to, among others, the hierarchy problem, and it has a possible candidate for dark matter. In the Minimal Supersymmetric extension of the SM (MSSM), the bosonic superpartners of the fermions (sfermions) can be classified into scalar leptons (sleptons) and scalar quarks (squarks).
The talk will focus on specific scenarios for the mass spectra of the supersymmetric particles and cover an ongoing search for slepton pair production. These scenarios are of particular interest since they explain the dark matter abundance observed in the universe and the longstanding muon g-2 discrepancy between the measured value and theoretical prediction.
Sleptons are unstable and decay to a lepton and the lightest supersymmetric particle (LSP), resulting in a final state with two same flavour opposite sign (SFOS) leptons and missing transverse momenta coming from the undetected LSP. In this search we exploit the flavour asymmetry of the signal final state (100% same flavour leptons) in order to discriminate signal from background. Sensitivity to a yet unexplored region in the phase-space will be demonstrated.