Searches for pair production of charginos and top squarks in final states with two oppositely charged leptons in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Abstract

A search for pair production of supersymmetric particles in events with two oppositely charged leptons (electrons or muons) and missing transverse momentum is reported. The data sample corresponds to an integrated luminosity of 35.9 fb${}^{-1}$ of proton-proton collisions at $\sqrt{s}=$ 13 TeV collected with the CMS detector during the 2016 data taking period at the LHC. No significant deviation is observed from the predicted standard model background. The results are interpreted in terms of several simplified models for chargino and top squark pair production, assuming $R$-parity conservation and with the neutralino as the lightest supersymmetric particle. When the chargino is assumed to undergo a cascade decay through sleptons, with a slepton mass equal to the average of the chargino and neutralino masses, exclusion limits at 95% confidence level are set on the masses of the chargino and neutralino up to 800 and 320 GeV, respectively. For the top squark pair production, the search focuses on models with a small mass difference between the top squark and the lightest neutralino. When the top squark decays into an off-shell top quark and a neutralino, the limits extend up to 420 and 360 GeV for the top squark and neutralino masses, respectively.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables, including additional supplementary figures and tables, can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-17-010 (CMS Public Pages)

References in corpus (64)

• 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
• An Introduction to PYTHIA 8.2
• Particle Dark Matter: Evidence, Candidates and Constraints
• FastJet user manual
• 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
• A Supersymmetry Primer
• Confidence Level Computation for Combining Searches with Small Statistics
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Particle-flow reconstruction and global event description with the CMS detector
• Measuring masses of semi-invisibly decaying particles pair produced at hadron colliders
• The CMS trigger system
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• Event generator tunes obtained from underlying event and multiparton scattering measurements
• MCFM for the Tevatron and the LHC
• Performance of CMS muon reconstruction in pp collision events at sqrt(s) = 7 TeV
• Jet energy scale and resolution in the CMS experiment in pp collisions at 8 TeV
• Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV
• FEWZ 2.0: A code for hadronic Z production at next-to-next-to-leading order
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• Simplified Models for LHC New Physics Searches
• Squark and Gluino Production at Hadron Colliders
• ZZ production at hadron colliders in NNLO QCD
• Threshold resummation for squark-antisquark and gluino-pair production at the LHC
• The Production of Charginos/Neutralinos and Sleptons at Hadron Colliders
• Simplified Models for a First Characterization of New Physics at the LHC
• Squark and gluino hadroproduction
• Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LHC
• Soft-gluon resummation for squark and gluino hadroproduction
• Squark and gluino production cross sections in pp collisions at $\sqrt{s}$ = 13, 14, 33 and 100 TeV
• Search for direct production of charginos, neutralinos and sleptons in final states with two leptons and missing transverse momentum in pp collisions at sqrt(s) = 8 TeV with the ATLAS detector
• $W^{+}{W}^{-}$ production at hadron colliders in NNLO QCD
• W+W-, WZ and ZZ production in the POWHEG BOX
• Searches for electroweak production of charginos, neutralinos, and sleptons decaying to leptons and W, Z, and Higgs bosons in pp collisions at 8 TeV
• Search for top-squark pair production in the single-lepton final state in pp collisions at sqrt(s) = 8 TeV
• Precision predictions for electroweak superpartner production at hadron colliders with Resummino
• Measurements of properties of the Higgs boson decaying into the four-lepton final state in pp collisions at sqrt(s) = 13 TeV
• Measurement of the differential cross section for top quark pair production in pp collisions at sqrt(s) = 8 TeV
• Gaugino production in proton-proton collisions at a center-of-mass energy of 8 TeV
• W+W-, WZ and ZZ production in the POWHEG BOX V2
• t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
• Search for electroweak production of supersymmetric particles in final states with two or three leptons at $\sqrt{s}=13$ TeV with the ATLAS detector
• Model-Independent Jets plus Missing Energy Searches
• Performance of the CMS missing transverse energy reconstruction in pp data at sqrt(s) = 8 TeV
• Dark Matter Searches with Astroparticle Data
• QCD corrections to $W^{+}{W}^{-}$ production through gluon fusion
• Search for electroweak production of supersymmetric states in scenarios with compressed mass spectra at $\sqrt{s}=13$ TeV with the ATLAS detector
• Measurement of differential cross sections for top quark pair production using the lepton+jets final state in proton-proton collisions at 13 TeV
• Search for a scalar partner of the top quark in the jets plus missing transverse momentum final state at $\sqrt{s}$=13 TeV with the ATLAS detector
• Search for top-squark pair production in final states with one lepton, jets, and missing transverse momentum using 36 fb${}^{-1}$ of $\sqrt{s}=13$ TeV $pp$ collision data with the ATLAS detector
• Search for the electroweak production of supersymmetric particles in $\sqrt{s}$=8 TeV $pp$ collisions with the ATLAS detector
• Search for the direct production of charginos, neutralinos and staus in final states with at least two hadronically decaying taus and missing transverse momentum in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Search for top squarks and dark matter particles in opposite-charge dilepton final states at $\sqrt{s}=$ 13 TeV
• Search for top squark pair production in pp collisions at sqrt(s) = 13 TeV using single lepton events
• Search for direct production of supersymmetric partners of the top quark in the all-jets final state in proton-proton collisions at sqrt(s) = 13 TeV
• Search for the direct production of charginos and neutralinos in $\sqrt{s}$ = 13 TeV $pp$ collisions with the ATLAS detector
• Search for direct top squark pair production in final states with two leptons in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• The SysCalc code: A tool to derive theoretical systematic uncertainties
• Measurement of the t t-bar production cross section in the all-jets final state in pp collisions at sqrt(s) = 8 TeV

Cited by in corpus (29)

• Search for electroweak production of charginos and sleptons decaying into final states with two leptons and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions using the ATLAS detector
• Combined collider constraints on neutralinos and charginos
• Constraining new physics with SModelS version 2
• 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
• GUT Physics in the era of the LHC
• SModelS database update v1.2.3
• LHC Searches for Dark Matter in Compressed Mass Scenarios: Challenges in the Forward Proton Mode
• Muon g-2 vs LHC Run 2 in Supersymmetric Models
• SModelS v2.3: enabling global likelihood analyses
• The Return of the WIMP: Missing Energy Signals and the Galactic Center Excess
• Combined search for electroweak production of winos, binos, higgsinos, and sleptons in proton-proton collisions at $\sqrt{s}$ = 13 TeV
• Resurrecting the Fraternal Twin WIMP Miracle
• Funnel annihilations of light dark matter and the invisible decay of the Higgs boson
• Singlino-dominated dark matter in $Z_3$-NMSSM
• Phenomenology of an extended IDM with loop-generated fermion mass hierarchies
• Constraints on $U(1{)}_{L_{\mu }-L_{\tau }}$ from LHC Data
• Is a Miracle-less WIMP Ruled Out?
• Resonance Searches with Machine Learned Likelihood Ratios
• Higgsino and gaugino pair production at the LHC with aNNLO+NNLL precision
• Twin Sterile Neutrino Dark Matter
• LHC sensitivity to singly-charged scalars decaying into electrons and muons
• Prospects for chargino pair production at CEPC
• Reinterpreting $pp\to W^{+}{W}^{-}$ searches for charginos
• The PeV-Scale Split Supersymmetry from Higgs Mass and Electroweak Vacuum Stability
• Status of ${\mathbb{Z}}_3$-NMSSM featuring a light bino-dominated LSP and a light singlet-like scalar under the LZ Experiment
• General search for supersymmetric particles in scenarios with compressed mass spectra using proton-proton collisions at $\sqrt{s}$ = 13 TeV
• New Physics and Two Boosted W-jets plus Missing Energy
• Searching for stop LSP at the LHC
• Searching for Gluino LSP at the LHC