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  • 1985-1989  (2)
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  • 1
    facet.materialart.
    Unknown
    The shadow world of superstring theories (1985)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Some possible astrophysical and cosmological implications of 'shadow matter', a form of matter which only interacts gravitationally with ordinary matter and which may or may not be identical in its properties to ordinary matter, are considered. The possible existence, amount, and location of shadow matter in the solar system are discussed, and the significance of shadow matter for primordial nucleosynthesis, macroscopic asymmetry, baryogenesis, double-bubble inflation, and asymmetric microphysics is addressed. Massive shadow states are discussed.
    Keywords: ASTROPHYSICS
    Type: Nature (ISSN 0028-0836); 314; 415-419
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    Primordial nucleosynthesis with generic particles (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-08-28
    Description: A revision of the standard model for Big Bang nucleosynthesis is discussed which allows for the presence of generic particle species. The primordial production of He-4 and D + He-3 is calculated as a function of the mass, spin degrees of freedom, and spin statistics of the generic particle for masses in the range 0.01-100 times the electron mass. The particular case of the Gelmini and Roncadelli majoron model for massive neutrinos is discussed.
    Keywords: ASTROPHYSICS
    Format: text
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    NASA TECHNICAL REPORTS
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