Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2008-10-29
Physics
High Energy Physics
High Energy Physics - Experiment
68 pages, 46 figures, 11 tables. Submitted to Phys. Rev. D. Removed typos from the authors' list
Scientific paper
We report a study of multi-muon events produced at the Fermilab Tevatron collider and recorded by the CDFII detector. In a data set acquired with a dedicated dimuon trigger and corresponding to an integrated luminosity of 2100 pb^-1, we isolate a significant sample of events in which at least one of the muon candidates is produced outside of the beam pipe of radius 1.5cm. The production cross section and kinematics of events in which both muon candidates are produced inside the beam pipe are successfully modeled by known QCD processes which include heavy flavor production. In contrast, we are presently unable to fully account for the number and properties of the remaining events, in which at least one muon candidate is produced outside of the beam pipe, in terms of the same understanding of the CDFII detector, trigger, and event reconstruction. Several topological and kinematic properties of these events are presented in this paper. These events offer a plausible resolution to long-standing inconsistencies related to b-bbar production and decay.
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