Transformation-Induced Nonthermal Neutrino Spectra and Primordial Nucleosynthesis

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dc.creatorAbazajian, Kevork
dc.creatorShi, Xiangdong
dc.creatorFuller, George M.
dc.date1999-09-17
dc.date.accessioned2026-07-07T02:33:21Z
dc.date.available2026-07-07T02:33:21Z
dc.descriptionWe examine in detail the changes in the production of primordial helium resulting from nonthermal neutrino momentum distributions produced by resonant transformation of electron-type neutrinos to steriles. These transformations, anti-nu_e -> anti-nu_s (nu_e->nu_s), amplify a positive (negative) lepton number asymmetry. We find that the resulting supression relative to a thermal distribution of low energy nu_e reduces n -> p conversion to a greater extent than does the enhancement of n -> p from an identical suppression of anti-nu_e. Thus, equal lepton-number asymmetries of opposite sign have unequal effects on the resulting helium yield in primordial nucleosynthesis.
dc.description12 pages, including 4 figures, submitted to Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/astro-ph/9909320
dc.identifierhttp://arxiv.org/abs/astro-ph/9909320
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/14809
dc.subjectAstrophysics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleTransformation-Induced Nonthermal Neutrino Spectra and Primordial Nucleosynthesis
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