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arXiv · hep-ph/0304102

Baryogenesis in a flat direction with neither baryon nor lepton charge

Takeshi Chiba·Fuminobu Takahashi·Masahide Yamaguchi
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Abstract

We present a new mechanism of spontaneous baryogenesis. Usually such mechanisms require a derivative coupling between a scalar field and baryon current. In our model, the scalar field instead derivatively couples to a current associated with some global symmetry $U(1)_Q$. In this case, baryogenesis is still possible provided that an interaction exists, which violates the baryon and $U(1)_Q$ symmetries simultaneously. As a concrete example, we discuss baryogenesis in a flat direction with neither baryon nor lepton charge.

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Takeshi Chiba, Fuminobu Takahashi, Masahide Yamaguchi. 2004-01-06. Baryogenesis in a flat direction with neither baryon nor lepton charge. https://doi.org/10.1103/physrevlett.92.011301

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