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Neutrino Breakup of A=3 Nuclei in Supernovae

E. O'Connor·D. Gazit·C. J. Horowitz·A. Schwenk·N. Barnea
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Abstract

We extend the virial equation of state to include 3H and 3He nuclei, and predict significant mass-three fractions near the neutrinosphere in supernovae. While alpha particles are often more abundant, we demonstrate that energy transfer cross-sections for muon and tau neutrinos at low densities are dominated by breakup of the loosely-bound 3H and 3He nuclei. The virial coefficients involving A=3 nuclei are calculated directly from the corresponding nucleon-3H and nucleon-3He scattering phase shifts. For the neutral-current inelastic cross-sections and the energy transfer cross sections, we perform ab-initio calculations based on microscopic two- and three-nucleon interactions and meson-exchange currents.

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E. O'Connor, D. Gazit, C. J. Horowitz, A. Schwenk, N. Barnea. 2007-04-04. Neutrino Breakup of A=3 Nuclei in Supernovae. https://doi.org/10.1103/physrevc.75.055803

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