NUCLEON SPIN FLUCTUATIONS AND THE SUPERNOVA EMISSION OF NEUTRINOS ANDAXIONS

Authors
JANKA HT KEIL W RAFFELT G SECKEL D
Citation
Ht. Janka et al., NUCLEON SPIN FLUCTUATIONS AND THE SUPERNOVA EMISSION OF NEUTRINOS ANDAXIONS, Physical review letters, 76(15), 1996, pp. 2621-2624
Citations number
29
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
76
Issue
15
Year of publication
1996
Pages
2621 - 2624
Database
ISI
SICI code
0031-9007(1996)76:15<2621:NSFATS>2.0.ZU;2-B
Abstract
In the hot and dense medium of a supernova (SN) core, the nucleon spin s fluctuate so fast that the axial-vector neutrino opacity and the axi on emissivity are expected to be significantly modified. Axions with m (a) less than or similar to 10(-2) eV are not excluded by SN 1987A. A substantial transfer of energy in neutrino-nucleon (nu N) collisions i s enabled which may alter the spectra of SN neutrinos relative to calc ulations where energy-conserving nu N collisions had been assumed near the neutrinosphere.