Bounds on neutrino magnetic moment tensor from solar neutrinos

Abstract

Solar neutrinos with non-zero magnetic moments will contribute to the electron scattering rates in the Super-Kamiokande experiment. The magnetic moment scattering events in Super-K can be accommodated in the standard VO or MSW solutions by a change of the parameter space of mass square difference and mixing angle-but the shifted neutrino parameters obtained from Super-K will (for some values of neutrino magnetic moments) become incompatible with the fits from SNO, Gallium and Chlorine experiments. We compute the upper bounds on the Dirac and Majorana magnetic moments of solar neutrinos by simultaneously fitting all the observed solar neutrino rates. The bounds the magnetic moment matrix elements are of the order of 10^{-10} Bohr magnetron.

9 pages latex file with 6 figures; References added, typos corrected, matches version to appear in Phys Rev D

References in corpus (3)

• Measurement of the rate of nu_e + d --> p + p + e^- interactions produced by 8B solar neutrinos at the Sudbury Neutrino Observatory
• Do solar neutrinos decay?
• Bounds on tau neutrino magnetic moment and charge radius from Super-K and SNO observations

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• Search for electron antineutrino interactions with the Borexino Counting Test Facility at Gran Sasso
• Supernova Neutrino Spectrum with Matter and Spin Flavor Precession Effects
• Neutrino electromagnetic interactions: a window to new physics
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• Random magnetic fields inducing solar neutrino spin-flavor precession in a three generation context
• Neutral Current induced ${\pi }^0$ production and neutrino magnetic moment