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

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 experiment during 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 produced in 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 no significant excess of muons produced a few centimeters away from the interaction point.