Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1998
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998tx19.confe.185k&link_type=abstract
Abstracts of the 19th Texas Symposium on Relativistic Astrophysics and Cosmology, held in Paris, France, Dec. 14-18, 1998. Eds.:
Astronomy and Astrophysics
Astrophysics
Scientific paper
The effects of radiatively decaying, long-lived particles on big-bang nucleosynthesis (BBN) are discussed. If high energy photons are emitted after BBN, they may change the abundances of the light elements through photodissociation processes, which may result in a significant discrepancy between the BBN theory and observation. We calculate the abundances of the light elements, including the effects of photodissociation induced by a radiatively decaying particle, and we derive a constraint on such particles by comparing our theoretical results with observations. Taking into account the recent controversies regarding the observations of the primordial D and ^4 He abundances, we derive constraints for various combinations of the measurements. We also discuss several models which predict such radiatively decaying particles (SUSY particles etc.), and we derive constraints on such models.
Holtmann Erich
Kawasaki Masahiro
Kohri Kazunori
Moroi Takeo
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