Soft leptogenesis and gravitino dark matter in gauge mediation

Koichi Hamaguchi, N. Yokozaki

Research output: Contribution to journalArticlepeer-review


In gauge mediated SUSY breaking models, the gravitino is generally the lightest SUSY particle and can be a candidate for a dark matter. However the viable abundance of the gravitino requires rather low reheating temparature. With this low reheating temparature, it is difficult to explain the baryon asymmetry of the universe with thermal leptogenesis. We consider the extended scenario of the gauge mediation, which generates A-terms. In this extended scenario, soft leptogenesis works successfully with the low reheating temperature. Therefore we can explain the baryon asymmetry and gravitino dark matter simultaneously.

Original languageEnglish
Pages (from-to)1533-1538
Number of pages6
JournalInternational Journal of Modern Physics D
Issue number8
Publication statusPublished - 2011 Aug 15
Externally publishedYes


  • Dark matter
  • SUSY
  • baryon asymmetry

ASJC Scopus subject areas

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science


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