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On the interpretation of the atmospheric neutrino data in terms of flavor changing neutrino interactions

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Valencià Castellano

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On the interpretation of the atmospheric neutrino data in terms of flavor changing neutrino interactions

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Fornengo, Nicolao; González García, Mª Concepción; Furtado Valle, José Wagner

Aquest document és un/a article, creat/da en: 2000

Flavour changing (FC) neutrino-matter interactions have been proposed as a solution to the atmospheric neutrino anomaly. Here we perform the analysis of the full set of the recent 52 kTy Super-Kamiokande atmospheric neutrino data, including the zenith angle distribution of the contained events as well as the higher energy upward-going stopping and through-going muon events. Our results show that the FC mechanism can describe the full data sample with a chi^2_{min}=44/(33 d.o.f) which is acceptable at the 90% confidence level. The combined analysis confines the amount of FC to be either close to maximal or to the level of about (10-50)%.

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