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Search for Resonant Production of Dark Quarks in the Dijet Final State with the ATLAS Detector
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abstract
This paper presents a search for a new $Z^\prime$ resonance decaying into a pair of dark quarks which hadronise into dark hadrons before promptly decaying back as Standard Model particles. This analysis is based on proton-proton collision data recorded at $\sqrt{s}=13$ TeV with the ATLAS detector at the Large Hadron Collider between 2015 and 2018, corresponding to an integrated luminosity of 139 fb$^{-1}$. After selecting events containing large-radius jets with high track multiplicity, the invariant mass distribution of the two highest-transverse-momentum jets is scanned to look for an excess above a data-driven estimate of the Standard Model multijet background. No significant excess of events is observed and the results are thus used to set 95 % confidence-level upper limits on the production cross-section times branching ratio of the $Z^\prime$ to dark quarks as a function of the $Z^\prime$ mass for various dark-quark scenarios.
Forward citations
Cited by 5 Pith papers
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Search for resonant production of lepton-enriched semivisible jets in proton-proton collisions at $\sqrt{s}$ = 13 TeV
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Search for emerging jets in $pp$ collisions at $\sqrt{s} = 13.6$ TeV with the ATLAS experiment
No evidence for emerging jets was found in 51.8 fb-1 of 13.6 TeV ATLAS data; new exclusion limits are set on s-channel Z' and t-channel scalar mediator models producing pairs of emerging jets.
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Search for new physics in final states with semi-visible jets or anomalous signatures using the ATLAS detector
ATLAS finds no sign of semi-visible jets from Z' decays and excludes Z' masses from 2000 to 3200 GeV for invisible fractions between 0.2 and 0.37.
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Search for emerging jets in $pp$ collisions at $\sqrt{s} = 13$ TeV with the ATLAS experiment
No excess of emerging-jet events appears in ATLAS Run 2 data, excluding pair-produced dark scalar mediators up to about 2 TeV for 20 GeV dark pions with 20 mm decay length.
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Brazilian Report on Dark Matter 2024
A white paper surveying Brazil's dark matter and dark sector activities in experiments, telescopes, colliders, and theory, arguing the community has grown and needs sustained support.
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