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Author Horowitz, C. J. ♦ Li, Gang
Source arXiv.org
Content type Text
File Format PDF
Date of Submission 1998-09-22
Language English
Subject Domain (in DDC) Computer science, information & general works ♦ Natural sciences & mathematics ♦ Astronomy & allied sciences ♦ Physics
Subject Keyword High Energy Physics - Phenomenology ♦ Astrophysics ♦ Nuclear Theory ♦ physics:astro-ph ♦ physics:hep-ph ♦ physics:nucl-th
Abstract The neutrino-nucleon cross section is slightly larger than that for $\bar\nu-N$. Therefore, $\bar\nu$ will escape more quickly from core collapse supernovae leaving the star $\nu$ rich. A diffusion formalism is used to calculate the time evolution of the mu and tau lepton number densities. These quickly reach steady state equilibria. We estimate that a protoneutron star with a maximum temperature near 50 MeV will contain over 50 % more $\nu_\mu$ and $\nu_\tau$ than $\bar\nu_\mu$ and $\bar\nu_\tau$. Supernovae may be the only known systems with large mu and or tau lepton numbers.
Description Reference: Phys.Lett. B443 (1998) 58-62
Educational Use Research
Learning Resource Type Article
Page Count 5


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