Abstract
A search is performed for the electroweak pair production of charginos and associated production of a chargino and neutralino, each of which decays through an -parity-violating coupling into a lepton and a , , or Higgs boson. The trilepton invariant-mass spectrum is constructed from events with three or more leptons, targeting chargino decays that include an electron or muon and a leptonically decaying boson. The analyzed dataset corresponds to an integrated luminosity of of proton-proton collision data produced by the Large Hadron Collider at a center-of-mass energy of and collected by the ATLAS experiment between 2015 and 2018. The data are found to be consistent with predictions from the Standard Model. The results are interpreted as limits at 95% confidence level on model-independent cross sections for processes beyond the Standard Model. Limits are also set on the production of charginos and neutralinos for a minimal supersymmetric Standard Model with an approximate symmetry. Charginos and neutralinos with masses between 100 and 1100 GeV are excluded depending on the assumed decay branching fractions into a lepton (electron, muon, or lepton) plus a boson (, , or Higgs).
2 More- Received 23 November 2020
- Accepted 23 April 2021
DOI:https://doi.org/10.1103/PhysRevD.103.112003
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
© 2021 CERN, for the ATLAS Collaboration