| Preprint | |
| Report number | CERN-EP-2025-045 |
| Title | Search for cascade decays of charged sleptons and sneutrinos in final states with three leptons and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector |
| ATLAS Collaboration | |
| 2025 | |
| ATLAS Collaboration | |
| 17 Mar 2025 | |
| Particle Physics - Experiment | |
| CERN LHC ;ATLAS | |
| supersymmetry ;sleptons ;sneutrinos | |
| A search for cascade decays of charged sleptons and sneutrinos using final states characterized by three leptons (electrons or muons) and missing transverse momentum is presented. The analysis is based on a dataset with 140 fb$^{-1}$ of proton-proton collisions at a center-of-mass energy of $\sqrt{s}=13$ TeV recorded by the ATLAS detector at the Large Hadron Collider. This paper focuses on a supersymmetric scenario that is motivated by the muon anomalous magnetic moment observation, dark mattter relic density abundance, and electroweak naturalness. A mass spectrum involving light higgsinos and heavier sleptons with a bino at intermediate mass is targeted. No significant deviation from the Standard Model expectation is observed. This search enables to place stringent constraints on this model, excluding at the 95% confidence level charged slepton and sneutrino masses up to 450 GeV when assuming a lightest neutralino mass of 100 GeV and mass-degenerate selectrons, smuons and sneutrinos. | |
| Preprint: © 2025 CERN (License:CC-BY-4.0) | |
| Submitted by | tatjana.lenz@cern.ch |
Record created 2025-03-17, last modified 2025-03-17
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