Energy Dependence of Solar Neutrino Suppression and Bounds on the Neutrino Magnetic Moment
Abstract
Description
An analysis of neutrino electron scattering as applied to the SuperKamiokande solar neutrino experiment with the data from the Homestake experiment leads to an upper bound on the neutrino magnetic moment in the range $μ_{ν_e}\leq(2.9-3.7)\times 10^{-10}μ_{B}$. This range is determined by the spread in the flux predictions from six different standard solar models. We assume equal magnetic moments for all neutrino flavours. This limit is obtained when neutrinos do not undergo any "disappearance" mechanism other than the magnetic moment conversion due to the solar magnetic field and for a total or nearly total suppression of the intermediate energy neutrinos. We also point out that the limit may be further reduced if the threshold energy of the SuperKamiokande detector is decreased.
Talk presented by JP at the XVI Autumn School CPMASS 97, Lisbon, Portugal, 6-15 October 1997 (to appear in the Proceedings)
Talk presented by JP at the XVI Autumn School CPMASS 97, Lisbon, Portugal, 6-15 October 1997 (to appear in the Proceedings)