TY - JOUR
T1 - Resonant neutrino spin-flavor precession and supernova nucleosynthesis and dynamics
AU - Nunokawa, H.
AU - Qian, Y. Z.
AU - Fuller, G. M.
PY - 1997
Y1 - 1997
N2 - We discuss the effects of resonant spin-flavor precession (RSFP) of Majorana neutrinos on heavy element nucleosynthesis in neutrino-heated supernova ejecta and the dynamics of supernovae. In assessing the effects of RSFP, we explicitly include matter-enhanced (MSW) resonant neutrino flavor conversion effects where appropriate. We point out that for plausible ranges of neutrino magnetic moments and protoneutron star magnetic fields, spin-flavor conversion of [Formula presented] (or [Formula presented]) with a cosmologically significant mass (1–100 eV) into a light [Formula presented] could lead to an enhanced neutron excess in neutrino-heated supernova ejecta. This could be beneficial for models of [Formula presented]-process nucleosynthesis associated with late-time neutrino-heated ejecta from supernovae. Similar spin-flavor conversion of neutrinos at earlier epochs could lead to an increased shock reheating rate and, concomitantly, a larger supernova explosion energy. We show, however, that such increased neutrino heating likely will be accompanied by an enhanced neutron excess which could exacerbate the problem of the overproduction of the neutron number [Formula presented] nuclei in the supernova ejecta from this stage. In all of these scenarios, the average [Formula presented] energy will be increased over those predicted by supernova models with no neutrino mixings. This may allow the SN 1987A data to constrain RSFP-based schemes.
AB - We discuss the effects of resonant spin-flavor precession (RSFP) of Majorana neutrinos on heavy element nucleosynthesis in neutrino-heated supernova ejecta and the dynamics of supernovae. In assessing the effects of RSFP, we explicitly include matter-enhanced (MSW) resonant neutrino flavor conversion effects where appropriate. We point out that for plausible ranges of neutrino magnetic moments and protoneutron star magnetic fields, spin-flavor conversion of [Formula presented] (or [Formula presented]) with a cosmologically significant mass (1–100 eV) into a light [Formula presented] could lead to an enhanced neutron excess in neutrino-heated supernova ejecta. This could be beneficial for models of [Formula presented]-process nucleosynthesis associated with late-time neutrino-heated ejecta from supernovae. Similar spin-flavor conversion of neutrinos at earlier epochs could lead to an increased shock reheating rate and, concomitantly, a larger supernova explosion energy. We show, however, that such increased neutrino heating likely will be accompanied by an enhanced neutron excess which could exacerbate the problem of the overproduction of the neutron number [Formula presented] nuclei in the supernova ejecta from this stage. In all of these scenarios, the average [Formula presented] energy will be increased over those predicted by supernova models with no neutrino mixings. This may allow the SN 1987A data to constrain RSFP-based schemes.
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U2 - 10.1103/PhysRevD.55.3265
DO - 10.1103/PhysRevD.55.3265
M3 - Article
AN - SCOPUS:0000700934
SN - 1550-7998
VL - 55
SP - 3265
EP - 3275
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
IS - 6
ER -