Structure of the Y(4260) and the J<sup>P</sup>=1<sup>-</sup> hidden-charm or hidden-strange exotic mesons
ORAL
Abstract
The q-qbar-s-sbar and q-qbar-c-cbar JPC=1--, 1-+ and charged 1- systems are investigated by a simplified quark cluster model.
In each of the 1-- systems, we have found one or more poles performing the 14 possible two-meson channel coupled calculation.
For the q-qbar-c-cbar, a pole appears close to the D1-Dbar or the ω-χc1 thresholds with a small width.
Three poles are found in the q-qbar-s-sbar 1--, which have a rather larger width.
A pole is found also in the q-qbar-s-sbar 1-+ systems.
We argue that they can be seeds of the observed exotic mesons such as the Y(4260) resonance.
We are going to discuss also the charged four quark systems in this meeting.
In each of the 1-- systems, we have found one or more poles performing the 14 possible two-meson channel coupled calculation.
For the q-qbar-c-cbar, a pole appears close to the D1-Dbar or the ω-χc1 thresholds with a small width.
Three poles are found in the q-qbar-s-sbar 1--, which have a rather larger width.
A pole is found also in the q-qbar-s-sbar 1-+ systems.
We argue that they can be seeds of the observed exotic mesons such as the Y(4260) resonance.
We are going to discuss also the charged four quark systems in this meeting.
*This work was supported by JSPS KAKENHI Grant Number 16K05361.
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Presenters
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Sachiko Takeuchi
- Japan College of Social Work