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arXiv · hep-ph/9808274

Aperiodic Spin-Flavor Conversions and $\tildeν_e$ from the Sun with Random Magnetic Field

V. B. Semikoz·A. A. Bykov·V. Yu. Popov·A. I. Rez·D. D. Sokoloff
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Abstract

The magnetic field in the solar convective zone has a random small-scale component with the r.m.s. value substantially exceeding the strength of a regular large-scale field. For two Majorana neutrino flavors $\times$ two helicities in the presence of a neutrino transition magnetic moment and nonzero neutrino mixing we analyze the displacement of the allowed ($Δm^2 - \sin^22θ$) - parameter region reconciled for the SuperKamiokande(SK) and radiochemical (GALLEX, SAGE, Homestake) experiments in dependence on the r.m.s. magnetic field value $b$. We find an effective production of electron antineutrinos in the Sun even for small neutrino mixing through the cascade conversions in the random magnetic field that would be a signature of the Majorana nature of neutrino if $\tildeν_{eR}$ will be registered. Basing on the present SK bound on electron antineutrinos we also estimated the corresponding excluded area in the plane $Δm^2, \sin^22θ$.

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V. B. Semikoz, A. A. Bykov, V. Yu. Popov, A. I. Rez, D. D. Sokoloff. 1998-08-10. Aperiodic Spin-Flavor Conversions and $\tildeν_e$ from the Sun with Random Magnetic Field. https://arxiv.org/abs/hep-ph/9808274

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