| DATE: |
2009-06-25 14:00 - |
| PLACE: |
Kenkyu Honkan 2F RM 220 |
| TITLE: |
Leptogenesis and cosmic rays in a decaying gravitino dark matter scenario |
| CONTACT: |
SAKURAI, Kazuki/sakurai AT post.kek.jp |
| SPEAKER: |
Dr. Tetsuo Shindou (Kogakuin) |
| LANGUAGE: |
English |
| ABSTRACT: |
The decaying gravitino dark matter scenario is considered. This scenario is interesting, because one can solve the gravitino problem of the leptogenesis in SUSY models. However an unnaturally small R-parity violation is required in the scenario. We introduce a model to produce such a small R-parity violation at a low energy scale. We also discuss how the decaying gravitino can contribute to the cosmic rays such as positron, anti-proton, and gamma ray.
Referenceˇ§ W. Buchmuller, M. Endo and T. Shindou, JHEP 0811 (2008) 079 [arXiv:0809.4667 [hep-ph]]; M. Endo and T. Shindou, arXiv:0903.1813 [hep-ph]; W. Buchmuller, A. Ibarra, T. Shindou, F. Takayama and D. Tran, arXiv:0906.1187 [hep-ph]. |
|
