Constraining the neutrino magnetic moment with anti-neutrinos from the Sun

Details Constraining the neutrino magnetic moment with anti-neutrinos from the Sun Constraining the neutrino magnetic moment with anti-neutrinos from the Sun

2003-11-03

arxiv.org/abs/hep-ph/0311014v2

Phys.Rev.Lett.93:051304,2004

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 3 figures. Final version to appear in Phys. Rev. Lett

Scientific paper

10.1103/PhysRevLett.93.051304

We discuss the impact of different solar neutrino data on the spin-flavor-precession (SFP) mechanism of neutrino conversion. We find that, although detailed solar rates and spectra allow the SFP solution as a sub-leading effect, the recent KamLAND constraint on the solar antineutrino flux places stronger constraints to this mechanism. Moreover, we show that for the case of random magnetic fields inside the Sun, one obtains a more stringent constraint on the neutrino magnetic moment down to the level of \mu_\nu \lsim few \times 10^{-12}\mu_B, similar to bounds obtained from star cooling.

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