Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector

Abstract

A search for a chargino$-$neutralino pair decaying via the 125 GeV Higgs boson into photons is presented. The study is based on the data collected between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fb${}^{-1}$ of $pp$ collisions at a centre-of-mass energy of 13 TeV. No significant excess over the expected background is observed. Upper limits at 95% confidence level for a massless ${\tilde{\chi }}_1^0$ are set on several electroweakino production cross-sections and the visible cross-section for beyond the Standard Model processes. In the context of simplified supersymmetric models, 95% confidence-level limits of up to 310 GeV in $m({\tilde{\chi }}_1^{\pm }/{\tilde{\chi }}_2^0)$, where $m({\tilde{\chi }}_1^0)=0.5$ GeV, are set. Limits at 95% confidence level are also set on the ${\tilde{\chi }}_1^{\pm }{\tilde{\chi }}_2^0$ cross-section in the mass plane of $m({\tilde{\chi }}_1^{\pm }/{\tilde{\chi }}_2^0)$ and $m({\tilde{\chi }}_1^0)$, and on scenarios with gravitino as the lightest supersymmetric particle. Upper limits at the 95% confidence-level are set on the higgsino production cross-section. Higgsino masses below 380 GeV are excluded for the case of the higgsino fully decaying into a Higgs boson and a gravitino.

arXiv comment46 pages in total, author list starting on page 30, 11 figures, 4 tables, submitted to JHEP. All figures including auxiliary figures are available at http://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/SUSY-2018-23

References in corpus (80)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
• The anti-k_t jet clustering algorithm
• A Brief Introduction to PYTHIA 8.1
• FastJet user manual
• Parton distributions for the LHC
• Asymptotic formulae for likelihood-based tests of new physics
• A general framework for implementing NLO calculations in shower Monte Carlo programs: the POWHEG BOX
• A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
• Matching NLO QCD computations with Parton Shower simulations: the POWHEG method
• Parton distributions for the LHC Run II
• New parton distributions for collider physics
• Event generation with SHERPA 1.1
• Parton distributions with LHC data
• The ATLAS Simulation Infrastructure
• New parton distribution functions from a global analysis of quantum chromodynamics
• Parton distributions in the LHC era: MMHT 2014 PDFs
• Combined Measurement of the Higgs Boson Mass in $pp$ Collisions at $\sqrt{s}=7$ and 8 TeV with the ATLAS and CMS Experiments
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC $pp$ collision data at $\sqrt{s}=$ 7 and 8 TeV
• Performance of the ATLAS Trigger System in 2015
• QCD matrix elements and truncated showers
• The Catchment Area of Jets
• Higgs boson gluon-fusion production in N3LO QCD
• Muon reconstruction performance of the ATLAS detector in proton--proton collision data at $\sqrt{s}$=13 TeV
• Production and Integration of the ATLAS Insertable B-Layer
• Topological cell clustering in the ATLAS calorimeters and its performance in LHC Run 1
• Improved luminosity determination in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector at the LHC
• Electron and photon performance measurements with the ATLAS detector using the 2015-2017 LHC proton-proton collision data
• NLO Electroweak Corrections to Higgs Boson Production at Hadron Colliders
• Simplified Models for LHC New Physics Searches
• NNLO QCD corrections to the Higgs-strahlung processes at hadron colliders
• The Production of Charginos/Neutralinos and Sleptons at Hadron Colliders
• Electroweak and QCD corrections to Higgs production via vector-boson fusion at the LHC
• Simplified Models for a First Characterization of New Physics at the LHC
• Measurement of the $Z/{\gamma }^{\ast }$ boson transverse momentum distribution in $pp$ collisions at $\sqrt{s}$ = 7 TeV with the ATLAS detector
• NLO QCD corrections to t anti-t H production in hadron collisions
• ATLAS $b$-jet identification performance and efficiency measurement with $t\bar{t}$ events in $pp$ collisions at $\sqrt{s}=13$ TeV
• NLO Higgs boson production via vector-boson fusion matched with shower in POWHEG
• Jet energy scale measurements and their systematic uncertainties in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Performance of electron and photon triggers in ATLAS during LHC Run 2
• NLO Higgs boson production via gluon fusion matched with shower in POWHEG
• Strong and electroweak corrections to the production of Higgs+2jets via weak interactions at the LHC
• Squark and gluino production cross sections in pp collisions at $\sqrt{s}$ = 13, 14, 33 and 100 TeV
• Higgs production via vector-boson fusion at NNLO in QCD
• Performance of missing transverse momentum reconstruction with the ATLAS detector using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Measurement of Higgs boson production in the diphoton decay channel in $pp$ collisions at center-of-mass energies of 7 and 8 TeV with the ATLAS detector
• NLO matrix elements and truncated showers
• Associated Higgs production with top quarks at the Large Hadron Collider: NLO QCD corrections
• One-Loop Analysis of the Electroweak Breaking in Supersymmetric Models and the Fine-Tuning Problems
• Precision predictions for electroweak superpartner production at hadron colliders with Resummino
• Mixed QCD-electroweak corrections to Higgs boson production in gluon fusion
• Higgs Radiation off Bottom Quarks at the Tevatron and the LHC
• Search for new particles decaying into dijets in proton-antiproton collisions at sqrt(s) = 1.96 TeV
• Exclusive Higgs Boson Production with bottom quarks at Hadron Colliders
• Measurements of Higgs boson properties in the diphoton decay channel with 36 fb${}^{-1}$ of $pp$ collision data at $\sqrt{s}=13$ TeV with the ATLAS detector
• Gaugino production in proton-proton collisions at a center-of-mass energy of 8 TeV
• Electroweak corrections to Higgs-strahlung off W/Z bosons at the Tevatron and the LHC with HAWK
• Measurement of the inclusive isolated prompt photon cross section in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Search for Scalar Diphoton Resonances in the Mass Range $65-600$ GeV with the ATLAS Detector in $pp$ Collision Data at $\sqrt{s}$ = 8 $TeV$
• Gluon-induced Higgs-strahlung at next-to-leading order QCD
• QCD NLO and EW NLO corrections to $t\bar{t}H$ production with top quark decays at hadron collider
• Search for resonances in diphoton events at $\sqrt{s}$=13 TeV with the ATLAS detector
• Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• On the characterisation of the underlying event
• Measurement of isolated-photon pair production in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Searches for electroweak neutralino and chargino production in channels with Higgs, Z, and W bosons in pp collisions at 8 TeV
• Measurement of the inclusive isolated prompt photon cross-section in pp collisions at sqrt(s)= 7 TeV using 35 pb-1 of ATLAS data
• Threshold resummation for gaugino pair production at hadron colliders
• Measurements of fiducial and differential cross sections for Higgs boson production in the diphoton decay channel at $\sqrt{s}=8$ TeV with ATLAS
• Higgs and Z-boson Signatures of Supersymmetry
• Higher Order QCD predictions for Associated Higgs production with anomalous couplings to gauge bosons
• General Neutralino NLSPs at the Early LHC
• Neutralino/chargino pair production at NLO+NLL with resummation-improved PDFs for LHC Run II
• Reduced LHC constraints for higgsino-like heavier electroweakinos
• Search for chargino and neutralino production in final states with a Higgs boson and missing transverse momentum at $\sqrt{s}=13$ TeV with the ATLAS detector
• Neutralinos and Sleptons at the LHC in Light of Muon $(g-2{)}_{\mu }$
• Probing minimal SUSY scenarios in the light of muon $g-2$ and dark matter
• Search for supersymmetry using Higgs boson to diphoton decays at $\sqrt{s}=$ 13 TeV

Cited by in corpus (13)

• 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
• Supersymmetric Interpretation of the Muon $g-2$ Anomaly
• 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
• 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
• Precise Measurements of the Decay of Free Neutrons
• SModelS v2.3: enabling global likelihood analyses
• Muon $g-2$ in Gauge Mediation without SUSY CP Problem
• Combined search for electroweak production of winos, binos, higgsinos, and sleptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Status of searches for electroweak-scale supersymmetry after LHC Run 2
• Building Kinetic Mixing From Scalar Portal Matter
• Shedding Light on Dark Matter at the LHC with Machine Learning
• Lepton-flavor violation and two loop electroweak corrections to $(g-2{)}_{\mu }$ in the triplets