Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in s =13 TeV pp collisions with the ATLAS detector

Summary, in English

A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of s=13 TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139 fb-1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015-2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV. © 2020 CERN. © 2020 CERN, for the ATLAS Collaboration.

• Author: Aad G.; T. Åkesson; S. Bocchetta; L. Bryngemark; E. Corrigan; C. Doglioni; K. Gregersen; E. Hansen; V. Hedberg; G. Jarlskog; C. Kalderon; E. Kellermann; B. Konya; E. Lytken; K. Mankinen; C. Marcon; J. Mjörnmark; G. Mullier; R. Poettgen; T. Poulsen; E. Skorda; O. Smirnova; Zwalinski L.
• Department/s: Particle and nuclear physics; eSSENCE: The e-Science Collaboration
• Publishing year: 2020
• Language: English
• Publication/Series: Physical Review D
• Volume: 101
• Issue: 7
• Links: http://dx.doi.org/10.1103/PhysRevD.101.072001
• Document type: Journal article
• Publisher: American Physical Society
• Topic: Subatomic Physics
• Status: Published
• ISBN/ISSN/Other: ISSN: 2470-0010