Atmospheric Neutrino Observations and Flavor Changing Interactions

M. C. González-García, M. M. Guzzo, P. I. Krastev, H. Nunokawa, O. L. G. Peres, V. Pleitez, J. W. F. Valle, R. Zukanovich Funchal

Type: Article

Publication Date: 1999-04-19

Citations: 121

DOI: https://doi.org/10.1103/physrevlett.82.3202

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Abstract

Flavor changing (FC) neutrino-matter interactions can account for the zenith-angle dependent deficit of atmospheric neutrinos observed in the SuperKamiokande experiment, without directly invoking neither neutrino mass, nor mixing. We find that FC $\nu_\mu$-matter interactions provide a good fit to the observed zenith angle distributions, comparable in quality to the neutrino oscillation hypothesis. The required FC interactions arise naturally in many attractive extensions of the Standard Model.

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