| DATE: |
2008-03-18 15:00 - 17:00 |
| PLACE: |
Kenkyu Honkan Rm. 321 |
| TITLE: |
Lambda(1405) in chiral dynamics |
| CONTACT: |
tsuda |
| SPEAKER: |
Dr. Tetsuo Hyodo (Technische Universitaet Muenchen/Yukawa Institute for Theoretical Physics) |
| LANGUAGE: |
Japanese |
| ABSTRACT: |
We discuss several aspects of the Lambda(1405) resonance
in relation to the recent developments of study of chiral dynamics.
In the first part, we review the framework of the chiral coupled-channel
approach in detail. In the second part, based on this appraoch,
we derive an effective single-channel Kbar N interaction, emphasizing
the important role of the pi Sigma channel and the structure of the
Lambda(1405) in Kbar N phenomenology. We study the behavior with
the number of colors (N_c) of the pole positions of the Lambda(1405),
in order to clarify the quark structure of the resonance by the Nc scaling.
From the viewpoint of the scattering theory, we analyze the origin of
the resonances in chiral dynamics, paying attention to the physical
meaning of the renormalization procedure. |
|
