Speaker
Dr
Sachiko Takeuchi
(Japan College of Social Work)
Description
The $q\bar q s\bar s$ and $q\bar q c\bar c$ $J^{PC}=1^{--}$ 4-body systems are investigated by a simplified quark cluster model, where the 14 relevant channels are coupled. In each of the systems, one or more poles have been found. For the $q\bar q c\bar c$, a pole appears close to the thresholds and its width is found to be small. The poles found in the $q\bar q s\bar s$ have rather larger width. We argue that they can be seeds of the observed exotic mesons like the $Y(4260)$.
Authors
Dr
Sachiko Takeuchi
(Japan College of Social Work)
Dr
Makoto Takizawa
(Showa Pharmaceutical University)
