Search for a dark matter candidate produced in association with a single top quark in $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV

TL;DR

This paper reports a search for dark matter produced alongside a single top quark in proton-antiproton collisions, setting upper limits on the production cross section based on data from the Tevatron collider.

Contribution

First search for dark matter produced with a single top quark in proton-antiproton collisions at Tevatron, establishing upper limits on the production cross section.

Findings

No significant excess over the standard model observed.

Set 95% CL upper limits of about 0.5 pb on cross section.

Limits applicable for dark matter mass 0-150 GeV/c^2.

Abstract

We report a new search for dark matter in a data sample of an integrated luminosity of 7.7 fb$^{-1}$ of Tevatron $p\bar{p}$ collisions at $\sqrt{s} = 1.96$ TeV, collected by the CDF II detector. We search for production of a dark matter candidate, $D$, in association with a single top quark. We consider the hadronic decay mode of the top quark exclusively, yielding a final state of three jets with missing transverse energy. The data are consistent with the standard model; we thus set 95% confidence level upper limits on the cross section of the process $p\bar{p}\rightarrow t+D$ as a function of the mass of the dark-matter candidate. The limits are approximately 0.5 pb for a dark-matter particle with mass in the range of 0-150 GeV/$c^{2}$.