We report a new search for dark matter in a data sample of an integrated luminosity of 7.7 fb(-1) of Tevatron p (p) over bar collisions at root 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 (p) over bar -> 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).
Titolo: | Search for a Dark Matter Candidate Produced in Association with a Single Top Quark in p(p)over-bar Collisions at root s=1.96 TeV |
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Data di pubblicazione: | 2012 |
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Digital Object Identifier (DOI): | http://dx.doi.org/10.1103/PhysRevLett.108.201802 |
Appare nelle tipologie: | 1.1 Articolo in rivista |