ATLAS Run 2 searches for electroweak production of supersymmetric particles interpreted within the pMSSM

Abstract

A summary of the constraints from searches performed by the ATLAS Collaboration for the electroweak production of charginos and neutralinos is presented. Results from eight separate ATLAS searches are considered, each using 140 fb${}^{-1}$ of proton-proton data at a centre-of-mass energy of $\sqrt{s}$=13 TeV collected at the Large Hadron Collider during its second data-taking run. The results are interpreted in the context of the 19-parameter phenomenological minimal supersymmetric standard model, where R-parity conservation is assumed and the lightest supersymmetric particle is assumed to be the lightest neutralino. Constraints from previous electroweak, flavour and dark matter related measurements are also considered. The results are presented in terms of constraints on supersymmetric particle masses and are compared with limits from simplified models. Also shown is the impact of ATLAS searches on parameters such as the dark matter relic density and the spin-dependent and spin-independent scattering cross-sections targeted by direct dark matter detection experiments. The Higgs boson and Z boson `funnel regions', where a low-mass neutralino would not oversaturate the dark matter relic abundance, are almost completely excluded by the considered constraints. Example spectra for non-excluded supersymmetric models with light charginos and neutralinos are also presented.

arXiv comment57 pages in total, author list starting page 40, 17 figures, 6 tables. Published in JHEP. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2020-15

References in corpus (27)

• An Introduction to PYTHIA 8.2
• MadGraph 5 : Going Beyond
• Out Of This World Supersymmetry Breaking
• Gaugino Mass without Singlets
• Precision Electroweak Measurements on the Z Resonance
• FeynHiggs: a program for the calculation of the masses of the neutral CP-even Higgs bosons in the MSSM
• SPheno, a program for calculating supersymmetric spectra, SUSY particle decays and SUSY particle production at e+ e- colliders
• SPheno 3.1: extensions including flavour, CP-phases and models beyond the MSSM
• Towards High-Precision Predictions for the MSSM Higgs Sector
• The Masses of the Neutral CP-even Higgs Bosons in the MSSM: Accurate Analysis at the Two-Loop Level
• The Higgs Boson Masses and Mixings of the Complex MSSM in the Feynman-Diagrammatic Approach
• SuperIso v3.0: A program for calculating flavor physics observables in 2HDM and supersymmetry
• General Gauge Mediation
• Simplified Models for a First Characterization of New Physics at the LHC
• High-precision predictions for the light CP-even Higgs Boson Mass of the MSSM
• Update of the global electroweak fit and constraints on two-Higgs-doublet models
• Precision predictions for electroweak superpartner production at hadron colliders with Resummino
• Supersymmetry Without Prejudice
• Reconciling EFT and hybrid calculations of the light MSSM Higgs-boson mass
• Precise prediction for the light MSSM Higgs boson mass combining effective field theory and fixed-order calculations
• HEPData: a repository for high energy physics data
• Likelihood Analysis of the pMSSM11 in Light of LHC 13-TeV Data
• Precision calculations in the MSSM Higgs-boson sector with FeynHiggs 2.14
• A global fit of the MSSM with GAMBIT
• Recasting direct detection limits within micrOMEGAs and implication for non-standard Dark Matter scenarios
• RECAST: Extending the Impact of Existing Analyses
• Implications of LHC search results on the W boson mass prediction in the MSSM

Cited by in corpus (4)

• The XLZD Design Book: Towards the Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• The LHC has ruled out Supersymmetry -- really?
• A joint explanation for the soft lepton and monojet LHC excesses in the wino-bino model
• Light right-handed Smuons at the LHC: Natural dark matter and $g_{\mu }-2$ in an unexplored realm of the pMSSM