We propose a variant scenario of spontaneous baryogenesis from asymmetric inflaton based on current-current interactions between the inflaton and matter fields with a non-zero B-. L charge. When the inflaton starts to oscillate around the minimum after inflation, it may lead to excitation of a CP-odd component, which induces an effective chemical potential for the B-. L number through the current-current interactions. We study concrete inflation models and show that the spontaneous baryogenesis scenario can be naturally implemented in the chaotic inflation in supergravity.
Takahashi, F., & Yamada, M. (2016). Spontaneous baryogenesis from asymmetric inflaton. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 756, 216–220. https://doi.org/10.1016/j.physletb.2016.03.020