QQqq Four-Quark Bound States in
Chiral SU(3) Quark Model |
| |
Authors: | ZHANG Ming ZHANG Hai-Xia ZHANG Zong-Ye |
| |
Institution: | 1. Institute of High Energy Physics, the Chinese Academy of Sciences, P.O. Box 918-4, Beijing 100049, China
;2. Graduate School of the Chinese Academy of Sciences,
Beijing 100049, China
;3. School of Biomedical Engineering, Capital Medical University,
Beijing 100069, China |
| |
Abstract: | The possibility of
QQqq
heavy-light four-quark bound
states has been analyzed by means of the chiral SU(3) quark model,
where Q is the heavy quark (c or b) and q is the light quark (u, d, or s). We obtain a bound state for the
bbnn configuration with quantum number
JP=1+,I=0 and for the ccnn
(JP=1+,I=0)
configuration, which is not bound but slightly above the D*D*
threshold (n is u or d quark). Meanwhile, we also conclude that
a weakly bound state in
bbnn system can also be found without considering the chiral quark interactions between the two light quarks, yet its binding energy is weaker than that with the
chiral quark interactions. |
| |
Keywords: | four-quark states quark model chiral symmetry |
|
| 点击此处可从《理论物理通讯》浏览原始摘要信息 |
| 点击此处可从《理论物理通讯》下载免费的PDF全文 |
|