Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at $\sqrt{s}=$ 13 TeV

Abstract

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb${}^{-1}$ collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on the model, the combined result excludes a top squark mass up to 1325 GeV for a massless neutralino, and a neutralino mass up to 700 GeV for a top squark mass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV.

arXiv commentReplaced with the published version. Added the journal reference and the DOI. All the figures and tables can be found at http://cms-results.web.cern.ch/cms-results/public-results/publications/SUS-20-002 (CMS Public Pages)

References in corpus (101)

• Adam: A Method for Stochastic Optimization
• TensorFlow: Large-Scale Machine Learning on Heterogeneous Distributed Systems
• 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
• Confidence Level Computation for Combining Searches with Small Statistics
• Parton distributions from high-precision collider data
• PDF4LHC recommendations for LHC Run II
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Minimal Flavour Violation: an effective field theory approach
• The total top quark pair production cross-section at hadron colliders through O(alpha_S^4)
• Top++: a program for the calculation of the top-pair cross-section at hadron colliders
• Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
• Particle-flow reconstruction and global event description with the CMS detector
• Tuning PYTHIA 8.1: the Monash 2013 Tune
• Pileup subtraction using jet areas
• Vector boson pair production at the LHC
• 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
• Description and performance of track and primary-vertex reconstruction with the CMS tracker
• Merging meets matching in MC@NLO
• Event generator tunes obtained from underlying event and multiparton scattering measurements
• 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
• Performance of electron reconstruction and selection with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• Natural SUSY Endures
• Performance of the CMS muon detector and muon reconstruction with proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Simplified Models for LHC New Physics Searches
• Squark and Gluino Production at Hadron Colliders
• Extraction and validation of a new set of CMS PYTHIA8 tunes from underlying-event measurements
• Threshold resummation for squark-antisquark and gluino-pair production at the LHC
• Combining QCD and electroweak corrections to dilepton production in FEWZ
• Simplified Models for a First Characterization of New Physics at the LHC
• Dark Matter Benchmark Models for Early LHC Run-2 Searches: Report of the ATLAS/CMS Dark Matter Forum
• 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
• Performance of the CMS Level-1 trigger in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Precision luminosity measurement in proton-proton collisions at $\sqrt{s}=$ 13 TeV in 2015 and 2016 at CMS
• Precision predictions for electroweak superpartner production at hadron colliders with Resummino
• Search for top-squark pair production in the single-lepton final state in pp collisions at sqrt(s) = 8 TeV
• Performance of photon reconstruction and identification with the CMS detector in proton-proton collisions at sqrt(s) = 8 TeV
• Performance of missing transverse momentum reconstruction in proton-proton collisions at $\sqrt{s}=$ 13 TeV using the CMS detector
• Supersymmetric top and bottom squark production at hadron colliders
• Scalar Simplified Models for Dark Matter
• Parameterized Machine Learning for High-Energy Physics
• Measurement of the inelastic proton-proton cross section at $\sqrt{s}=$ 13 TeV
• Jet Flavour Classification Using DeepJet
• Measurement of the top quark mass using proton-proton data at sqrt(s) = 7 and 8 TeV
• Search for top squark pair production in final states with one isolated lepton, jets, and missing transverse momentum in $\sqrt{s}=$ 8 TeV pp collisions with the ATLAS detector
• Minimal Kinematic Constraints and MT2
• t tbar W and t tbar Z Hadroproduction at NLO accuracy in QCD with Parton Shower and Hadronization effects
• ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider
• Pileup subtraction for jet shapes
• Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques
• NNLL-fast: predictions for coloured supersymmetric particle production at the LHC with threshold and Coulomb resummation
• Search for direct top-squark pair production in final states with two leptons in pp collisions at sqrt(s)=8TeV with the ATLAS detector
• Model-Independent Jets plus Missing Energy Searches
• Reconstruction and identification of tau lepton decays to hadrons and tau neutrino at CMS
• Probing dark matter couplings to top and bottom at the LHC
• Minimal Flavour Violation and Beyond
• Search for production of four top quarks in final states with same-sign or multiple leptons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Self-Interacting Dark Matter from the Hidden Heterotic-String Sector
• S-particles at their naturalness limits
• NNLL resummation for squark-antisquark pair production at the LHC
• Search for a scalar partner of the top quark in the all-hadronic $t\bar{t}$ plus missing transverse momentum final state at $\sqrt{s}=13$ TeV with the ATLAS detector
• Measurement of the t-tbar production cross section in the e-mu channel in proton-proton collisions at sqrt(s) = 7 and 8 TeV
• NNLL resummation for stop pair-production at the LHC
• Search for top squarks in final states with one isolated lepton, jets, and missing transverse momentum in $\sqrt{s}=13$ TeV $pp$ collisions with the ATLAS detector
• Search for dark matter produced in association with bottom or top quarks in $\sqrt{s}$ = 13 TeV pp collisions with the ATLAS detector
• Four-point correlation function of stress-energy tensors in N=4 superconformal theories
• 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 direct top squark pair production in events with one lepton, jets, and missing transverse momentum at 13 TeV with the CMS experiment
• A comprehensive approach to dark matter studies: exploration of simplified top-philic models
• Measurements of top-quark pair spin correlations in the $e\mu$ channel at $\sqrt{s}=13$ TeV using $pp$ collisions in 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
• Search for top squark production in fully-hadronic final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Dark matter production through loop-induced processes at the LHC: the s-channel mediator case
• Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks
• Search for new phenomena with top quark pairs in final states with one lepton, jets, and missing transverse momentum in $pp$ collisions at $\sqrt{s}$= 13 TeV with the ATLAS detector
• Search for new phenomena in events with two opposite-charge leptons, jets and missing transverse momentum in $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
• Search for top squark pair production using dilepton final states in pp collision data collected at $\sqrt{s}=$ 13 TeV
• Search for the pair production of third-generation squarks with two-body decays to a bottom or charm quark and a neutralino in proton-proton collisions at sqrt(s) = 13 TeV
• Searches for pair production of third-generation squarks in sqrt(s) = 13 TeV pp collisions
• Measurements of differential cross sections of top quark pair production as a function of kinematic event variables in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for top squark pair production in compressed-mass-spectrum scenarios in proton-proton collisions at sqrt(s) = 8 TeV using the alpha[T] variable
• Search for dark matter particles produced in association with a top quark pair at $\sqrt{s}=$ 13 TeV
• Search for direct pair production of scalar top quarks in the single- and dilepton channels in proton-proton collisions at sqrt(s) = 8 TeV
• Search for the pair production of light top squarks in the e${}^{\pm }{\mu }^{\mp }$ final state in proton-proton collisions at $\sqrt{s}=$ 13 TeV

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• Phenomenology of unusual top partners in composite Higgs models
• Studying the $b\to s{\ell }^{+}{\ell }^{-}$ anomalies and $(g-2{)}_{\mu }$ in $R$-parity violating MSSM framework with the inverse seesaw mechanism
• The Muon Magnetic Moment and Physics Beyond the Standard Model
• Portable acceleration of CMS computing workflows with coprocessors as a service
• Deconstructing squark contributions to di-Higgs production at the LHC
• The Hierarchy Problem and the Top Yukawa: An Alternative to Top Partner Solutions
• NNLL-fast 2.0: Coloured Sparticle Production at the LHC Run 3 with $\sqrt{S}$ = 13.6 TeV
• Collider fingerprints of freeze-in dark matter produced during the fast expansion phase of Universe
• The Radiative Flavor Template at the LHC: Lepton non-universality and g-2
• Search for dark matter mediator in the production of three and four top quarks
• Markov Chain Monte Carlo analysis to probe trilinear $R$-parity violating SUSY scenarios and possible LHC signatures
• Explaining the $B_{d(s)}\to K^{(\ast )}{\bar{K}}^{(\ast )}$ puzzle via chiral-flip in $R$-parity violating MSSM with seesaw mechanism
• Searching for stop LSP at the LHC