Search for resonant production of dark quarks in the dijet final state with the ATLAS detector

The ATLAS collaboration [email protected]

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Abstract

This paper presents a search for a new Z′ 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 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′ to dark quarks as a function of the Z′ mass for various dark-quark scenarios.

Original languageEnglish
Article number128
JournalJournal of High Energy Physics
Volume2024
Issue number2
DOIs
StatePublished - Feb 2024

Keywords

  • Beyond Standard Model
  • Dark Matter
  • Exotics
  • Hadron-Hadron Scattering

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