We report a study of multi-muon events produced at the
Fermilab Tevatron collider and recorded by the CDF II 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 pi+pe of radius 1.5 cm. The production cross section and
kinematics of events in which both muon candidates are produced inside
the beam pi+pe 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
pi+pe, in terms of the same understanding of the CDF II 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 bb-bar production and decay.
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Updated: Wednesday, 2010 December 22 15:51:45 CST automatically from input from Carol Picciolo