| DATE: |
2011-12-20 16:00 - 17:00 |
| PLACE: |
Kenkyu Honkan 1F, Meeting Room 1 |
| TITLE: |
Comments on Stability for de Sitter Vacua in String Theory |
| CONTACT: |
Yoshinori MATSUO, ymatsuo-AT-post.kek.jp |
| SPEAKER: |
Dr. YoskeˇˇSumitomo (Hong Kong University of Science and Technology) |
| LANGUAGE: |
English |
| URL: |
http://research.kek.jp/group/www-theory/schedule.html |
| ABSTRACT: |
We analyze a property of mass matrix at positive extrema in type II string theory. In IIA, off-diagonal components are not suppressed, therefore tachyonic directions are likely met in the presence of many moduli. While in a IIB model, such the suppression is achieved due to a hierarchy by non-perturbative effect and an alpha' correction. Many moduli may help to realize small cosmological constant in the model. |
