Speaker
Kei SHIBATA
(Nagoya Univ.)
Description
In this study, we show that thermal leptogenesis can be realized within the framework of the $SO(10)\times U(1)_A$ grand unified theory(GUT). Furthermore, by including flavor effects, we have found that the second-lightest right-handed neutrino makes a significant contribution. As a result, the mass derived in this study is approximately six times larger than the mass predicted for the right-handed neutrino by the $SO(10)\times U(1)_A$ GUT. This also implies that the mass of the left-handed neutrino becomes approximately one-sixth of the value predicted by the same symmetry.
Primary authors
Kei SHIBATA
(Nagoya Univ.)
Prof.
Masato YAMANAKA
(Shikoku gakuin univ.)
Prof.
Nobuhiro MAEKAWA
(Nagoya Univ.)
