Leptogenesis via neutrino oscillation magic

Yuta Hamada, Ryuichiro Kitano, Wen Yin

研究成果: Article査読

10 被引用数 (Scopus)

抄録

The possibility of generating the baryon asymmetry of the Universe via flavor oscillation in the early Universe is discussed. After the inflation, leptons are born in some states, travel in the medium, and are eventually projected onto flavor eigenstates due to the scattering via the Yukawa interactions. By using the Lagrangian of the Standard Model with the Majorana neutrino mass terms, llHH, we follow the time evolution of the density matrices of the leptons in this very first stage of the Universe and show that the CP violation in the flavor oscillation can explain the baryon asymmetry of the Universe. In the scenario where the reheating is caused by the decay of the inflaton into the Higgs bosons, the baryon asymmetry is generated by the CP phases in the Pontecorvo-Maki-Nakagawa-Sakata matrix and thus can be tested by the low energy neutrino experiments.

本文言語English
論文番号178
ジャーナルJournal of High Energy Physics
2018
10
DOI
出版ステータスPublished - 2018 10 1
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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