Origin of trimuon events in high-energy neutrino interactions |
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| Authors: | T Hansl M Holder J Knobloch J May HP Paar P Palazzi A Para F Ranjard D Schlatter J Steinberger H Suter W von Rüden H Wahl S Whitaker EGH Williams F Eisele K Kleinknecht H Lierl FL Navarria |
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| Institution: | CERN, Geneva, Switzerland |
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| Abstract: | The properties of 76 neutrino-initiated μ?μ?μ+ events observed in the CDHS detector in the 350 GeV and 400 GeV wide-band beams at the CERN SPS are discussed. For neutrino energies > 30 GeV and muon momenta ? 4.5 GeV, the average trimuon rate is (3.0±0.4)×10?5 of the single-muon event rate. The data are in agreement with normal charged-current interactions with the additional production of a muon pair by both hadronic and radiative processes. No evidence is found for either heavy-lepton or heavy-quark cascades. Upper limits for these two possibilities are established. |
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