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Dimuon Production by Neutrinos in the Fermilab 15 ft. Bubble Chamber at the Tevatron

par Jain, Vivek;Marage, Pierre ; [et al.]
Référence Physical review. D, Particles, fields, gravitation, and cosmology, 41, page (2057-2073)
Publication Publié, 1990

Article révisé par les pairs

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Résumé :

The Fermilab 15-ft bubble chamber has been exposed to a quadrupole triplet neutrino beam produced at the Tevatron. The ratio of to in the beam is approximately 2.5. The mean event energy for -induced charged-current events is 150 GeV, and for -induced charged-current events it is 110 GeV. A total of 64 dimuon candidates (1+, 52 -+ and -, and 11 --) is observed in the data sample of approximately 13 300 charged-current events. The number and properties of the -- and + candidates are consistent with their being produced by background processes, the important sources being and K decay and punchthrough. The 90%-C.L. upper limit for --/- for muon momenta above 4 GeV/c is 1.2×10-3, and for momenta above 9 GeV/c this limit is 1.1×10-3. The opposite-sign-dimuono single-muon ratio is (0.62±0.13)% for muon momenta above 4 GeV/c. There are eight neutral strange particles in the opposite-sign sample, leading to a rate per dimuon event of 0.65±0.29. The opposite-sign-dimuon sample is consistent with the hypothesis of charm production and decay. © 1990 The American Physical Society.