Speaker
Takayuki Matsuki
(Tokyo Kasei University)
Description
In the past decade, many of charmoniumlike and bottomoniumlike states have been reported in experiments, which have led us to extensive discussions on the underlying structure of these states. We would like to address the possibility to explain these structures by hadronic one-loop diagrams, which may correspond to recapitulate threshold effects. Starting from charged XYZ states, we also apply our mechanism to the recent Zc(3900) as well as Zb(4430).
Summary
Including the hadronic one-loop diagrams, many of charged as well as neutral charmoniumlike and bottomoniumlike states can be successfully explained. That is to say, many of these states as evidence of existence of multi-quark states can be explained in the ordinary quark picture by our findings. A real multi-quark state may exist when our fitting can not be applied, e.g., a couple of states among three Zb states observed by Belle and LHCb.
Author
Takayuki Matsuki
(Tokyo Kasei University)
Co-authors
Prof.
Dian-Yong Chen
(Institute of Modern Physics, CAS)
Prof.
Xiang Liu
(Lanzhou University)
