Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2003-04-10
Phys. Rev. Lett. 92:011301,2004
Physics
High Energy Physics
High Energy Physics - Phenomenology
5 pages, no figures, to be published in Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.92.011301
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.
Chiba Takeshi
Takahashi Fuminobu
Yamaguchi Masahide
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