Atmospheric neutrino observations and flavor changing interactions

Details Atmospheric neutrino observations and flavor changing interactions Atmospheric neutrino observations and flavor changing interactions

1998-09-25

arxiv.org/abs/hep-ph/9809531v3

Phys.Rev.Lett.82:3202-3205,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

RevTex, 4 pages, 2 postscript figures, some minor modifications in the text and few new references are added, no change in the

Scientific paper

10.1103/PhysRevLett.82.3202

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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