Physics
Scientific paper
Jun 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994stin...9520383q&link_type=abstract
Unknown
Physics
Flavor (Particle Physics), Forward Scattering, Neutrinos, Particle Interactions, Supernovae, Hamiltonian Functions, Nuclear Fusion, Particle Motion
Scientific paper
The authors examine matter-enhanced neutrino flavor transformation (nutau(mu) reversible transformation nue) in the region above the neutrino sphere in Type 2 supernovae. Their treatment explicitly includes contributions to the neutrino-propagation Hamiltonian from neutrino-neutrino forward scattering. A proper inclusion of these contributions shows that they have a completely negligible effect on the range of nue-nutau(mu) vacuum mass-squared difference, delta m2, and vacuum mixing angle, theta, or equivalently sin2 2 theta, required for enhanced supernova shock reheating. When neutrino background effects are included, the authors find that r-process nucleosynthesis from neutrino-heated supernova ejecta remains a sensitive probe of the mixing between a light nue and a nutau(mu) with a cosmologically significant mass. Neutrino-neutrino scattering contributions are found to have a generally small effect on the (delta m2, sin2 2 theta) parameter region probed by r-process nucleosynthesis. They point out that the nonlinear effects of the neutrino background extend the range of sensitivity of reprocess nucleosynthesis to smaller values of delta m2.
Fuller George M.
Qian Yong-Zhong
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