Spontaneous baryogenesis in flat directions

Fuminobu Takahashi, Masahide Yamaguchi

Research output: Contribution to journalArticlepeer-review

53 Citations (Scopus)


We discuss a spontaneous baryogenesis mechanism in flat directions. After identifying the Nambu-Goldstone mode which derivatively couples to the associated [Formula Presented] current and rotates due to the A term, we show that spontaneous baryogenesis can be naturally realized in the context of the flat direction. As applications, we discuss two scenarios of baryogenesis in detail. One is baryogenesis in a flat direction with a vanishing [Formula Presented] charge, especially with neither baryon nor lepton charge, which was recently proposed by Chiba and the present authors. The other is a baryogenesis scenario compatible with a large lepton asymmetry.

Original languageEnglish
Pages (from-to)10
Number of pages1
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number8
Publication statusPublished - 2004


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