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- Takafumi Endoh, Shuichi Kaneko, Sung-Shig Kang, Takuya Morozumi, Morimitsu Tanimoto
- Physical review letters
- 2002

We study the correlation between CP violation in neutrino oscillations and leptogenesis in the framework with two heavy Majorana neutrinos and three light neutrinos. Among three unremovable CP phases, a heavy Majorana phase contributes to leptogenesis. We show how the heavy Majorana phase contributes to Jarlskog determinant J as well as neutrinoless double… (More)

- Masaru Kamada, Takafumi Endoh, Koichi Ichige, Kazuo Toraichi
- Int. J. Systems Science
- 1996

We study the structure of CP violating phases in the seesaw model. We find that the 3× 6 MNS matrix contains six independent phases, three of which are identified as a Dirac phase and two Majorana phases in the light neutrino sector while the remaining three arise from the mixing of the light neutrinos and heavy neutrinos. We show how to determine these… (More)

- Takafumi Endoh
- 2002

In the previous paper[1] we have identified the CP violating phases of the seesaw model and found six independent phases. In the case where the heavy right-handed Majorana mass has a strong hierarchy in the diagonal basis M1 ≫ M2 ≫ M3, the diagonalization of the seesaw matrix is possible under the assumption that the elements in Yukawa-Dirac mass matrix are… (More)

How is CP violation of low energy related to CP violation required from baryon number asymmetry ? We give an example which shows a direct link between CP violation of neutrino oscillation and baryogenesis through leptogenesis. When the sphaleron process is active, the sum of baryon number and lepton number is not a conserved quantity; d(B+L) dt = Anomaly 6=… (More)

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