Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-06-25
Physics
High Energy Physics
High Energy Physics - Phenomenology
7 pages, LaTeX, 5 EPS figures, based on the talk presented by N.V. Mikheev at the XIV International Seminar Quarks'2006, St.-P
Scientific paper
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. It is shown 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 astrophysical upper bound on the neutrino magnetic moment is improved by the factor of 3 to 7.
Kuznetsov Alexander Vasilievich
Mikheev Nickolay V.
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