Neutrino Oscillation Effects on Supernova Light Element Synthesis

Abstract

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.

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

References in corpus (2)

• Supernova Neutrino Nucleosynthesis of Light Elements with Neutrino Oscillations
• Direct Measurement of Supernova Neutrino Emission Parameters with a Gadolinium-Enhanced Super-Kamiokande Detector

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• Neutrino Spectrum from SN 1987A and from Cosmic Supernovae
• New Constraints on Radiative Decay of Long-Lived Particles in Big Bang Nucleosynthesis with New ${}^4$He Photodisintegration Data
• nu-Process Nucleosynthesis in Population III Core-Collapse Supernovae
• Untangling supernova-neutrino oscillations with beta-beam data
• Neutrino oscillations in magnetically driven supernova explosions