Neutrino masses and mixings: Big Bang and Supernova nucleosynthesis and neutrino dark matter

Journal Article · Thu Jul 15 04:00:00 EDT 1999 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.59427· OSTI ID:21208159

Fuller, George M ^[1]

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1. Department of Physics, University of California, San Diego, La Jolla, California 92093-0319 (United States)

The existence of small mixings between light active and sterile neutrino species could have implications for Big Bang and Supernova Heavy Element Nucleosynthesis. As well, such mixing would force us to abandon cherished constraints on light neutrino Dark Matter. Two proposed 4-neutrino mass and mixing schemes, for example, can both accomodate existing experimental results and lead to elegant solutions to the neutron-deficit problem for r-Process nucleosynthesis from neutrino-heated supernova ejecta. Each of these solutions is based on matter-enhanced (MSW) active-sterile neutrino transformation. In plausible extensions of these schemes to the early universe, Shi and Fuller have shown that relatively light mass ({approx}200 eV to {approx}10 keV) sterile neutrinos produced via active-sterile MSW conversion can have a 'cold' energy spectrum. Neutrinos produced in this way circumvent the principal problem of light neutrino dark matter and would be, essentially, Cold Dark Matter.

• OSTI ID: 21208159
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 478; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
COSMOLOGY
ENERGY SPECTRA
EV RANGE
KEV RANGE
MATHEMATICAL SOLUTIONS
NEUTRINOS
NEUTRONS
NONLUMINOUS MATTER
NUCLEOSYNTHESIS
PARTICLE PRODUCTION
R PROCESS
REST MASS
SUPERNOVAE
TRANSFORMATIONS
UNIVERSE