| 日時: |
2007-04-17 11:00 - 12:00 |
| 場所: |
４号館３階３４５号室 |
| 会議名: |
Low-Energy Leptonic CP-Violation and Leptogenesis |
| 連絡先: |
津田 |
| 講演者: |
Serguey T. Petcov (SISSA, Trieste, Italy) |
| 講演言語: |
英語 |
| アブストラクト: |
Understanding the origin of the baryon, or matter-antimatter, asymmetry of the universe is one of the most challenging problems in modern particle physics and cosmology. One attractive solution to this problem is provided by the leptogenesis scenario of Fukugita-Yanagida. In this scenario a net lepton number is generated in out-of equilibrium CP-violating decays of heavy right-handed Majorana neutrinos. The latter are integral part of the see-saw mechanism of generation of neutrino masses. The generated lepton number is converted into a net baryon number by B+L violating but B-L conserving sphaleron processes. In this talk I discuss the possibility that the CP-violation necessary for the creation of the baryon asymmetry of the Universe can be due exclusively to the CP-violating phases in the neutrino mixing matrix. In particular, it can be due to the Dirac CP-violating phase which can cause CP-violation effects in neutrino oscillations, T2K and other experiments will be searching for.
|
|
