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Informal Pizza SeminarSpontaneous Baryogenesis in Flat DirectionsMasahide YamaguchiBrown UniversityWe discuss the spontaneous baryogenesis mechanism in flat directions. After identifying the Nambu-Goldstone mode which derivatively couples to the associated U(1) current, 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 vanishing B-L charge, especially, with neither baryon nor lepton charge, which was recently proposed by Chiba and us. The other is a baryogenesis scenario compatible with a large lepton asymmetry.
Thursday, August 7th 2003, 13:00
Ernest Rutherford Physics Building, room 327 |