Neutrino Oscillation Effects on Supernova Light Element Synthesis

Details Neutrino Oscillation Effects on Supernova Light Element Synthesis Neutrino Oscillation Effects on Supernova Light Element Synthesis

2006-06-02

arxiv.org/abs/astro-ph/0606042v1

Astrophys.J.649:319-331,2006

Astronomy and Astrophysics

Astrophysics

35 pages, 17 figures, accepted for publication in Astrophysical Journal

Scientific paper

10.1086/506374

Neutrino oscillations affect light element synthesis through the neutrino-process in supernova explosions. The 7Li and 11B yields produced in a supernova explosion of a 16.2 solar-mass star model increase by factors of 1.9 and 1.3 in the case of large mixing angle solution with normal mass hierarchy and sin^{2}2theta_{13} > 0.002 compared with those without the oscillations. In the case of inverted mass hierarchy or nonadiabatic 13-mixing resonance, the increment of their yields is much smaller. Neutrino oscillations raise the reaction rates of charged-current neutrino-process reactions in the region outside oxygen-rich layers. The number ratio of 7Li/11B could be a tracer of normal mass hierarchy and relatively large theta_{13}, still satisfying sin^{2}2theta_{13} < 0.1, through future precise observations in stars having strong supernova component.

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