Single-pion production in antineutrino-induced neutral-current interactions |
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| Authors: | O Erriques MT Folgi Muciaccia S Natali S Nuzzo A Halsteinslid K Myklebost A Rognebakke O Skjeggestad S Bonetti D Cavalli A Pullia M Rollier T Bolognese G Bonneaud B Escoubes JL Guyonnet D Huss M Paty F Ramzan |
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| Institution: | 1. Istituto di Fisica dell''Universita, Bari, Italy;2. I.N.F.N., Bari, Italy;3. Istituto di Fisica dell''Universita, Milan, Italy;4. I.N.F.N., Milan, Italy |
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| Abstract: | Results are presented on antineutrino-induced processes in which a single π0or π? is produced. The raw data come from analysis of film from Gargamelle filled with a propane-freon mixture. Comparison of the neutral-current production rates for π0and π?, after correction for nuclear effects, indicates that pure isoscalar or pure isovector transitions are not favoured. The ratio of the neutral-to-charged-current single-π0 production rates is found to be compatible with the static model for Δ33 resonance production in the framework of the Weinberg-Salam theory, yielding values for sin2θW in the range 0.15–0.52. |
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