Neutrino helicity flip by Cerenkov emission and absorption of plasmons in supernova

Details Neutrino helicity flip by Cerenkov emission and absorption of plasmons in supernova Neutrino helicity flip by Cerenkov emission and absorption of plasmons in supernova

1997-10-20

arxiv.org/abs/hep-ph/9710404v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

2 pages, latex, 2 figures

Scientific paper

We show that in a supernova core the longitudinal photon (plasmon) has a space-like dispersion and Cerenkov absorption and emission of such photons is kinematically allowed. If the neutrino has a non-zero magnetic moment, then helicity flipping Cerenkov absorption of a plasmon $\nu_L+\gamma\to\nu_R$ is the most efficient cooling mechanism of the supernova core, and this allows us to put a restrictive bound on the neutrino magnetic moment $\mu_{\nu}~<~0.7\times 10^{-13}\mu_B$.

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