Nucleon spin fluctuations and the supernova emission of neutrinos and axions.


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 ma ∼ 10 eV are not excluded by SN 1987A. A substantial transfer of energy in neutrino-nucleon (νN) collisions is enabled which may alter the spectra… (More)


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