Multimuon Final States in Muon-Nucleon Scattering at 270 GeV

Abstract
Data from a new muon-nucleon scattering experiment includes 513 events, of which 449 are dimuons and 64 are trimuons. Conventional hadronic and electromagnetic processes account for less than 15% of these events. Model calculations suggest that the majority of the dimuons result from associated charm production with a total cross section of about 3 nb.