Search for dark matter produced in association with a dark Higgs boson decaying into $W^{+}{W}^{-}$ in the one-lepton final state at $\sqrt{s}$=13 TeV using 139 fb${}^{-1}$ of $pp$ collisions recorded with the ATLAS detector

Abstract

Several extensions of the Standard Model predict the production of dark matter particles at the LHC. A search for dark matter particles produced in association with a dark Higgs boson decaying into $W^{+}{W}^{-}$ in the ${\ell }^{\pm }\nu q{\bar{q}}^{\prime }$ final states with $\ell =e,\mu$ is presented. This analysis uses 139 fb${}^{-1}$ of $pp$ collisions recorded by the ATLAS detector at a centre-of-mass energy of 13 TeV. The $W^{\pm }\to q{\bar{q}}^{\prime }$ decays are reconstructed from pairs of calorimeter-measured jets or from track-assisted reclustered jets, a technique aimed at resolving the dense topology from a pair of boosted quarks using jets in the calorimeter and tracking information. The observed data are found to agree with Standard Model predictions. Scenarios with dark Higgs boson masses ranging between 140 and 390 GeV are excluded.

arXiv comment47 pages in total, 9 figures, 4 tables. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2020-04/

References in corpus (49)

• 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
• A Brief Introduction to PYTHIA 8.1
• 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
• Herwig++ Physics and Manual
• Parton distributions with LHC data
• PDF4LHC recommendations for LHC Run II
• Dark Matter Candidates from Particle Physics and Methods of Detection
• Parton distributions in the LHC era: MMHT 2014 PDFs
• Scattering Amplitudes with Open Loops
• Herwig 7.0 / Herwig++ 3.0 Release Note
• A parton shower algorithm based on Catani-Seymour dipole factorisation
• A Positive-Weight Next-to-Leading-Order Monte Carlo for Heavy Flavour Hadroproduction
• QCD Matrix Elements + Parton Showers
• Comix, a new matrix element generator
• Event Generation with Sherpa 2.2
• QCD matrix elements + parton showers: The NLO case
• High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
• Single-top Wt-channel production matched with parton showers using the POWHEG method
• QCD matrix elements and truncated showers
• Collier: a fortran-based Complex One-Loop LIbrary in Extended Regularizations
• Single-top hadroproduction in association with a W boson
• The Catchment Area of Jets
• A critical appraisal of NLO+PS matching methods
• OpenLoops 2
• Dark Matter Benchmark Models for Early LHC Run-2 Searches: Report of the ATLAS/CMS Dark Matter Forum
• HistFitter software framework for statistical data analysis
• Single-top t-channel hadroproduction in the four-flavour scheme with POWHEG and aMC@NLO
• Implications of unitarity and gauge invariance for simplified dark matter models
• Matching Tree-Level Matrix Elements with Interleaved Showers
• Scalar Simplified Models for Dark Matter
• Power Counting to Better Jet Observables
• Beyond Effective Field Theory for Dark Matter Searches at the LHC
• Handbook of LHC Higgs Cross Sections: 3. Higgs Properties
• Operation of the ATLAS trigger system in Run 2
• Dark Matter Searches with Astroparticle Data
• Constraining Dark Sectors at Colliders: Beyond the Effective Theory Approach
• Reweighting QCD matrix-element and parton-shower calculations
• How to save the WIMP: global analysis of a dark matter model with two s-channel mediators
• Identifying WIMP dark matter from particle and astroparticle data
• Hunting the dark Higgs
• Collider Searches for Dark Matter through the Higgs Lens
• Indirect dark-matter detection with MadDM v3.2 -- Lines and Loops

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