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Macroscopic Strings and “Quirks” at Colliders

By Junhai Kang A and Markus A. Luty


We consider extensions of the standard model containing additional heavy particles (“quirks”) charged under a new unbroken non-abelian gauge group as well as the standard model. We assume that the quirk mass m is in the phenomenologically interesting range 100 GeV–TeV, and that the new gauge group gets strong at a scale Λ < m. In this case breaking of strings is exponentially suppressed, and quirk production results in strings that are long compared to Λ−1. The existence of these long stable strings leads to highly exotic events at colliders. For 100 eV < ∼ Λ < ∼ keV the strings are macroscopic, giving rise to events with two separated quirk tracks with measurable curvature toward each other due to the string interaction. For keV < ∼ Λ &lt

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