Charge-conjugation violating neutrino interactions in supernovae

Details Charge-conjugation violating neutrino interactions in supernovae Charge-conjugation violating neutrino interactions in supernovae

1999-08-19

arxiv.org/abs/astro-ph/9908219v1

Phys.Rev. D61 (2000) 063002

Astronomy and Astrophysics

Astrophysics

14 pages, 2 included ps figures, subm. to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.61.063002

The well known charge conjugation violating interactions in the Standard Model increase neutrino- and decrease anti-neutrino- nucleon cross sections. This impacts neutrino transport in core collapse supernovae through "recoil" corrections of order the neutrino energy $k$ over the nucleon mass $M$. All $k/M$ corrections to neutrino transport deep inside a protoneutron star are calculated from angular integrals of the Boltzmann equation. We find these corrections significantly modify neutrino currents at high temperatures. This produces a large mu and tau number for the protoneutron star and can change the ratio of neutrons to protons. In addition, the relative size of neutrino mean free paths changes. At high temperatures, the electron anti-neutrino mean free path becomes {\it longer} than that for mu or tau neutrinos.

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