Photodissociation and the Non-Thermal Process in Primordial Nucleosynthesis

Details Photodissociation and the Non-Thermal Process in Primordial Nucleosynthesis Photodissociation and the Non-Thermal Process in Primordial Nucleosynthesis

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cosm.conf..375k&link_type=abstract

COSMO-2000 . Proceedings of the Fourth International Workshop on Particle Physics and the Early Universe . Held 4-8 September 20

Physics

Scientific paper

In this talk, we present the recent progress on the primordial nucleosynthesis due to the photo-dissociation of light elements caused by the decay of a massive particle after the standard big-bang nucleosynthesis epoch. Especially, very recently it was reported by the other group that the non-thermal production of 6Li constrains the number density of the parent massive particles most severely. Here we show that the theoretical prediction of 6Li abundance is uncertain due to lack of the experimental data of the cross sections, and the observational value has large errors. Therefore we find 3He overproduction due to 4He photodissociation still gives the strongest constraint. Then compared to the observational light element abundances, we can constrain the model of the inflation scenario and particle physics.

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