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Scientific article
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English

Search for direct production of winos and higgsinos in events with two same-charge leptons or three leptons in pp collision data at $ \sqrt{s} $ = 13 TeV with the ATLAS detector

ContributorsATLAS Collaboration
Published inThe journal of high energy physics, vol. 2023, 150
Publication date2023
First online date2023-11-22
Abstract

A search for supersymmetry targeting the direct production of winos and higgsinos is conducted in final states with either two leptons (e or μ) with the same electric charge, or three leptons. The analysis uses 139 fb$^{−1}$ of pp collision data at $ \sqrt{s} $ = 13 TeV collected with the ATLAS detector during Run 2 of the Large Hadron Collider. No significant excess over the Standard Model expectation is observed. Simplified and complete models with and without R-parity conservation are considered. In topologies with intermediate states including either Wh or WZ pairs, wino masses up to 525 GeV and 250 GeV are excluded, respectively, for a bino of vanishing mass. Higgsino masses smaller than 440 GeV are excluded in a natural R-parity-violating model with bilinear terms. Upper limits on the production cross section of generic events beyond the Standard Model as low as 40 ab are obtained in signal regions optimised for these models and also for an R-parity-violating scenario with baryon-number-violating higgsino decays into top quarks and jets. The analysis significantly improves sensitivity to supersymmetric models and other processes beyond the Standard Model that may contribute to the considered final states.

eng
Keywords
  • Hadron-Hadron Scattering
  • Supersymmetry
  • P p: scattering
  • P p: colliding beams
  • Charge: electric
  • Dilepton: final state
  • Final state: (2lepton)
  • Final state: (3lepton)
  • Wino: direct production
  • Higgsino: direct production
  • New physics: search for
  • Supersymmetry: parameter space
  • R parity: violation
  • Baryon number: violation
  • ATLAS
  • Bino: mass
  • Sensitivity
  • CERN LHC Coll
  • Conservation law
  • Intermediate state
  • Topology
  • Wino: mass
  • Higgsino: mass
  • Mass: lower limit
  • Channel cross section: upper limit
  • Experimental results
  • 13000 GeV-cms
Citation (ISO format)
ATLAS Collaboration. Search for direct production of winos and higgsinos in events with two same-charge leptons or three leptons in pp collision data at $ \sqrt{s} $ = 13 TeV with the ATLAS detector. In: The journal of high energy physics, 2023, vol. 2023, p. 150. doi: 10.1007/jhep11(2023)150
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ISSN of the journal1029-8479
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