Nucleon Spin Fluctuations and the Supernova Emission of Neutrinos and Axions

Details Nucleon Spin Fluctuations and the Supernova Emission of Neutrinos and Axions Nucleon Spin Fluctuations and the Supernova Emission of Neutrinos and Axions

1995-07-07

arxiv.org/abs/astro-ph/9507023v2

Phys.Rev.Lett.76:2621-2624,1996

Astronomy and Astrophysics

Astrophysics

8 pages. REVTeX. 2 postscript figures, can be included with epsf. Small modifications of the text, a new "Note Added", and thr

Scientific paper

10.1103/PhysRevLett.76.2621

In the hot and dense medium of a supernova (SN) core, the nucleon spins fluctuate so fast that the axial-vector neutrino opacity and the axion emissivity are expected to be significantly modified. Axions with $m_a\alt10^{-2}\,{\rm eV}$ are not excluded by SN~1987A. A substantial transfer of energy in neutrino-nucleon ($\nu N$) collisions is enabled which may alter the spectra of SN neutrinos relative to calculations where energy-conserving $\nu N$ collisions had been assumed near the neutrinosphere.

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