We report a new search for dark matter in a data sample of
an integrated luminosity of 7.7 fb-1 of Tevatron pp̅ collisions
at √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 pp̅ →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/c2.
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Updated: Wednesday, 2012 May 16 16:13:09 CDT automatically from input from Stephanie A Schuler