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arXiv · 2110.11096

Leptonic CP asymmetry and Light flavored scalar

Yoshihiko Abe·Toshimasa Ito·Koichi Yoshioka
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Abstract

We consider a situation where right-handed neutrinos couple to a light scalar which is possibly a Nambu-Goldstone boson resulting from high-energy symmetry breaking. Its coupling is typically complex-valued and flavor-dependent. In this work, we investigate the possibility of the leptonic asymmetry generation in the Universe from the right-handed neutrino decay to flavorful light scalar. Furthermore a new source of asymmetry generation from a single decay process is pointed out, which is characteristic of the present setting.

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Yoshihiko Abe, Toshimasa Ito, Koichi Yoshioka. 2021-10-21. Leptonic CP asymmetry and Light flavored scalar. https://arxiv.org/abs/2110.11096

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