An additional study of multi-muon events produced in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV.

Abstract

Wepresentoneadditionalstudyofmulti-muoneventsproducedattheFermilabTevatroncolliderand recordedbytheCDFIIdetector.Weuseadatasetacquiredwithadedicateddimuontriggerand correspondingtoanintegratedluminosityof3.9fb?1.Weinvestigatethedistributionoftheazimuthal anglebetweenthetwotriggermuonsineventscontainingatleastfouradditionalmuoncandidatesto testthecompatibilityoftheseeventswithoriginatingfromknownQCDprocesses.Wefindthatthis distributionismarkedlydifferentfromwhatisexpectedfromsuchQCDprocessesandthisobservation stronglydisfavorsthepossibilitythatmulti-muoneventsresultfromanunderestimateoftherateof misidentifiedmuonsinordinaryQCDevents.