Search for new fermions ("quirks") at the Fermilab Tevatron Collider

Abstract

We report results of a search for particles with anomalously high ionization in events with a high transverse energy jet and large missing transverse energy in $2.4$ fb${}^{-1}$ of integrated luminosity collected by the D0 experiment at the Fermilab Tevatron $p\bar{p}$ collider. Production of such particles (quirks) is expected in scenarios with extra QCD-like {\it SU(N)} sectors, and this study is the first dedicated search for such signatures. We find no evidence of a signal and set a lower mass limit of 107 ~GeV for the mass of a charged quirk with strong dynamics scale $\Lambda$ in the range from 10 keV to 1 MeV.

arXiv commentsubmitted to Phys. Rev. Letters

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• Constraining Quirky Tracks with Conventional Searches
• Quirks in supersymmetry with gauge coupling unification
• Science and Project Planning for the Forward Physics Facility in Preparation for the 2024-2026 European Particle Physics Strategy Update
• The quirk signal at FASER and FASER 2
• Uncovering quirk signal via energy loss inside tracker
• Letter of Intent: The Forward Physics Facility