New bounds on the neutrino magnetic moment from the plasma induced neutrino chirality flip in a supernova

Abstract

The neutrino chirality-flip process under the conditions of the supernova core is investigated in detail with the plasma polarization effects in the photon propagator taken into account, in a more consistent way than in earlier publications. It is shown in part that the contribution of the proton fraction of plasma is essential. New upper bounds on the neutrino magnetic moment are obtained: mu_nu < (0.5 - 1.1) 10^{-12} mu_B from the limit on the supernova core luminosity for nu_R emission, and mu_nu < (0.4 - 0.6) 10^{-12} mu_B from the limit on the averaged time of the neutrino spin-flip. The best upper bound on the neutrino magnetic moment from SN1987A is improved by the factor of 3 to 7.

arXiv comment19 pages, LaTeX, 7 EPS figures, submitted to Journal of Cosmology and Astroparticle Physics

References in corpus (6)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Theory of Core-Collapse Supernovae
• Neutrino Energy Loss from the Plasma Process at all Temperatures and Densities
• Bound on the neutrino magnetic moment from chirality flip in supernovae
• Neutrinos with Magnetic Moment: Depolarization Rate in Plasma

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• A proposal for the origin of the anomalous magnetic moment
• Spin flip of neutrinos with magnetic moment in core-collapse supernova
• Metric Relativity and the Dynamical Bridge: highlights of Riemannian geometry in physics
• Dirac-Neutrino Magnetic Moment and the Dynamics of a Supernova Explosion
• Dirac neutrino magnetic moment and a possible time evolution of the neutrino signal from a supernova
• Dirac neutrino magnetic moment and the shock wave revival in a supernova explosion