| DATE: |
2005-08-25 11:00 - |
| PLACE: |
Kenkyu Honkan 2F RM 220 |
| TITLE: |
B -> K pi puzzle and new physics in B -> K nu \bar{nu} |
| CONTACT: |
Tango |
| SPEAKER: |
Dr. Chaehyun Yu (Yonsei University) |
| LANGUAGE: |
English |
| ABSTRACT: |
In the light of new experimental results on $B \to K\pi$ decays, we study the decay processes $B \to K \pi$ in a phenomenological way. Using the quark diagram approach and the currently available data, we determine the allowed values of the relevant theoretical parameters, corresponding to the electroweak (EW) penguin, the color-suppressed tree contribution, etc. The current data for $B \to K\pi$ decays strongly indicate large enhancements of both the EW penguin and the color-suppressed tree contributions. Next, we will consider one of possbile new physics scenarios in this puzzle and apply it to $B \to K(K^\ast,\pi,\rho) \nu \bar{\nu}$ decays.
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