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

Abstract

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 $\sqrt{s}$ = 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 dataset are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV.

44 pages in total, author list starting page 28, 7 figures, 7 tables, submitted to Physical Review D. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-06

References in corpus (24)

• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• An Introduction to PYTHIA 8.2
• Parton distributions for the LHC
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Event generation with SHERPA 1.1
• Parton distributions in the LHC era: MMHT 2014 PDFs
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Single-top hadroproduction in association with a W boson
• Electron and photon performance measurements with the ATLAS detector using the 2015-2017 LHC proton-proton collision data
• Simplified Models for a First Characterization of New Physics at the LHC
• HATHOR for single top-quark production: Updated predictions and uncertainty estimates for single top-quark production in hadronic collisions
• Performance of electron and photon triggers in ATLAS during LHC Run 2
• Squark and gluino production cross sections in pp collisions at $\sqrt{s}$ = 13, 14, 33 and 100 TeV
• HistFitter software framework for statistical data analysis
• Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV
• Higgs boson production in association with top quarks in the POWHEG BOX
• Evaluation of three methods for calculating statistical significance when incorporating a systematic uncertainty into a test of the background-only hypothesis for a Poisson process
• Searching for Directly Decaying Gluinos at the Tevatron
• Recursive Jigsaw Reconstruction: HEP event analysis in the presence of kinematic and combinatoric ambiguities
• Measurement of the WW cross section in sqrt(s) = 7 TeV pp collisions with the ATLAS detector and limits on anomalous gauge couplings
• Search for electroweak production of charginos and neutralinos using leptonic final states in pp collisions at sqrt(s) = 7 TeV
• Sparticles in Motion - getting to the line in compressed scenarios with the Recursive Jigsaw Reconstruction

Cited by in corpus (45)

• Search for chargino--neutralino pair production in final states with three leptons and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Search for charginos and neutralinos in final states with two boosted hadronically decaying bosons and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Constraining new physics with SModelS version 2
• Muon $g-2$ and $B$-anomalies from Dark Matter
• Search for doubly and singly charged Higgs bosons decaying into vector bosons in multi-lepton final states with the ATLAS detector using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Publishing statistical models: Getting the most out of particle physics experiments
• SModelS database update v1.2.3
• Search for electroweak production of charginos and neutralinos in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Non-Decoupling New Particles
• Muon g-2 vs LHC Run 2 in Supersymmetric Models
• Search for higgsinos decaying to two Higgs bosons and missing transverse momentum in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Electron and Muon Anomalous Magnetic Moments in the Inverse Seesaw Extended NMSSM
• SModelS v2.3: enabling global likelihood analyses
• Searching for Supersymmetry: The $\mu \nu$SSM
• Reproducibility and Replication of Experimental Particle Physics Results
• Funnel annihilations of light dark matter and the invisible decay of the Higgs boson
• Combined search for electroweak production of winos, binos, higgsinos, and sleptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Singlino-dominated dark matter in $Z_3$-NMSSM
• Impact of recent $(g-2{)}_{\mu }$ measurement on the light CP-even Higgs scenario in general Next-to-Minimal Supersymmetric Standard Model
• Constraining Electroweakinos in the Minimal Dirac Gaugino Model
• Magnetic Moments of Leptons, Charged Lepton Flavor Violations and Dark Matter Phenomenology of a Minimal Radiative Dirac Neutrino Mass Model
• Strength in numbers: optimal and scalable combination of LHC new-physics searches
• Signal region combination with full and simplified likelihoods in MadAnalysis 5
• Electroweakino searches at the HL-LHC in the baryon number violating MSSM
• Explanation of electron and muon $g-2$ anomalies in AMSB
• Natural Supersymmetry: Status and Prospects
• New Physics Search at the CEPC: a General Perspective
• Proceedings of the second MadAnalysis 5 workshop on LHC recasting in Korea
• Global LHC constraints on electroweak-inos with SModelS v2.3
• Search for new phenomena in three- or four-lepton events in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• The new $(g-2{)}_{\mu }$ and Right-Handed Sneutrino Dark Matter
• Dark matter and radiative neutrino masses in conversion-driven scotogenesis
• Higgsino and gaugino pair production at the LHC with aNNLO+NNLL precision
• Radiative Corrections to Aid the Direct Detection of the Higgsino-like Neutralino Dark Matter: Spin-Independent Interactions
• Taking aim at the wino-higgsino plane with the LHC
• Probing bino NLSP at lepton colliders
• Corrections to Yukawa couplings from higher dimensional operators in a natural SUSY $\mathsf{SO}(10)$ and HL-LHC implications
• Building Kinetic Mixing From Scalar Portal Matter
• Dark matter constraints and the neutralino sector of the scNMSSM
• General search for supersymmetric particles in scenarios with compressed mass spectra using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Learning Selection Cuts With Gradients
• Status of ${\mathbb{Z}}_3$-NMSSM featuring a light bino-dominated LSP and a light singlet-like scalar under the LZ Experiment
• New Physics and Two Boosted W-jets plus Missing Energy
• Can electron and muon $g-2$ anomalies be jointly explained in SUSY?
• Search for chargino-neutralino production using an emulated recursive jigsaw reconstruction technique in three-lepton final states with the ATLAS detector