Late baryogenesis faces primordial nucleosynthesis

Details Late baryogenesis faces primordial nucleosynthesis Late baryogenesis faces primordial nucleosynthesis

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992phlb..276..115d&link_type=abstract

Physics Letters B, Volume 276, Issue 1-2, p. 115-121.

Physics

3

Scientific paper

Since the sphaleron mechanism present in the standard theory of electroweak interactions violates B+L, models have been suggested where baryogenesis takes place at late epochs and is concomitant with primordial nucleosynthesis. We have numerically investigated the possibility for the baryon asymmetry to be generated at the same time as the light elements are cooked. We conclude that the primordial yields of D, 3He, 4He and 7Li far exceed the upper limits inferred from observation, unless baryogenesis is anterior to the freeze-out of the weak interactions. This implies strong constraints on scenarios where the baryon asymmetry originates from the late decay of massive gravitinos.

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