Baryogenesis in a flat direction with neither baryon nor lepton charge

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.

5 pages, no figures, to be published in Phys. Rev. Lett

References in corpus (4)

• Spontaneous baryogenesis in warm inflation
• K-essential Leptogenesis
• Quintessential Baryogenesis
• Generation of cosmological large lepton asymmetry from a rolling scalar field

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