Search for dark matter produced in association with a dark Higgs boson decaying into $W^{\pm }{W}^{\mp }$ or $ZZ$ in fully hadronic final states from $\sqrt{s}=13$ TeV $pp$ collisions recorded with the ATLAS detector

Abstract

Several extensions of the Standard Model predict the production of dark matter particles at the LHC. An uncharted signature of dark matter particles produced in association with $VV=W^{\pm }{W}^{\mp }$ or $ZZ$ pairs from a decay of a dark Higgs boson $s$ is searched for using 139 fb${}^{-1}$ of $pp$ collisions recorded by the ATLAS detector at a center-of-mass energy of 13 TeV. The $s\to V(q\bar{q})V(q\bar{q})$ decays are reconstructed with a novel technique aimed at resolving the dense topology from boosted $VV$ pairs using jets in the calorimeter and tracking information. Dark Higgs scenarios with $m_s>160$ GeV are excluded.

32 pages in total, author list starting page 16, 4 figures, 1 table, submitted to Physical Review Letters. All figures including auxiliary figures available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2018-40/

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• Collider Searches for Dark Matter through the Higgs Lens
• Prospecting bipartite Dark Matter through Gravitational Waves
• Search for dark matter produced in association with a dark Higgs boson in the $b\bar{b}$ final state using $pp$ collisions at $\sqrt{s}=13$ TeV with the ATLAS detector
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• New Physics and Two Boosted W-jets plus Missing Energy
• Energy scale and resolution for anti-$k_t$ jets with radius parameters $R=0.2$ and 0.6 measured in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS detector