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We report on a study of dimuon events produced in $p\bar{p}$ collisions at$\sqrt{s} = 1.96$ TeV, using 0.9fb$^{-1}$ of data recorded by the D0 experimentduring 2008. Using information from the inner-layer silicon tracking detector,we observe $712 \pm 462 \pm 942$ events in which one or both muons are producedin the range $1.6 < r \lesssim 10$ cm, which is expressed as a fraction $(0.40\pm 0.26 \pm 0.53)%$ of the total dimuon sample. We therefore see nosignificant excess of muons produced a few centimeters away from theinteraction point.

Search for Excess Dimuon Production in the Radial Region (1.6 < r < 10) cm at the D0 Experiment