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

TL;DR

This study investigates dimuon events in proton-antiproton collisions at 1.96 TeV, focusing on muons produced 1.6 to 10 cm from the interaction point, finding no significant excess compared to expectations.

Contribution

First measurement of muon production at intermediate radial distances in proton-antiproton collisions using D0 data, with no observed excess.

Findings

Observed 712 ± 462 ± 942 events in the radial range

No significant excess of muons produced away from the interaction point

Fraction of such events is (0.40 ± 0.26 ± 0.53)% of total dimuons

Abstract

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.