Gravitino-induced baryogenesis: A problem made a virtue

Details Gravitino-induced baryogenesis: A problem made a virtue Gravitino-induced baryogenesis: A problem made a virtue

Mar 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991phrvd..43.1781c&link_type=abstract

Physical Review D (Particles and Fields), Volume 43, Issue 6, 15 March 1991, pp.1781-1787

Physics

45

Scientific paper

We investigate cosmic baryon generation in the minimal low-energy supergravity model with the addition of dimension-four baryon-violating interactions. It is shown that gravitinos, if heavier than squarks, can give rise to a baryon asymmetry as they decay. Assuming that gravitinos are not diluted by inflation in the post-Planckian epoch, we find a realistic baryon-to-photon ratio for various ranges of gaugino and squark masses between 100 GeV and 10 TeV. We thus solve two problems simultaneously-the question of whence baryons originate and how to avoid washing out the baryon-photon ratio due to entropy production from decaying gravitinos.

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