| Chiral SU（3） Quark Model Study of Tetraquark States： cnn^-s^-/css^-s^- |
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| 引用本文： | ZHANG Hai-Xia,;WANG Wen-Ling,;DAI Yuan-Ben,;ZHANG Zong-Ye. Chiral SU（3） Quark Model Study of Tetraquark States： cnn^-s^-/css^-s^-[J]. 理论物理通讯, 2008, 49(2): 414-420 |
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| 作者姓名： | ZHANG Hai-Xia, WANG Wen-Ling, DAI Yuan-Ben, ZHANG Zong-Ye |
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| 作者单位： | [1]Institute of High Energy Physics, the Chinese Academy of Sciences, P.O. Box 918-4, Beijing 100049, China; [2]Institute of Particle Physics, Central China Normal University, Wuhan 430079, China; [3]Institute of Theoretical Physics, the Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080, China |
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| 基金项目： | The project supported in part by National Natural Science Foundation of China under Grant No 10475087.Acknowledgments We are in debt to Prof. Y.W. Yu and Dr. F. Huang for stimulating discussions. |
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| 摘 要： | The new members of the charm-strange family Dsj^＊（2317）, Dsj（2460）, and Ds（2632）, which have the surprising properties, are challenging the present models. Many theoretical interpretations have been devoted to this issue. Most authors suggest that they are not the conventional cs^- quark model states, but possibly are four-quark states, molecule states, or mixtures of a P-wave cs^- and a four-quark state. In this work, we follow the four-quark-state picture, and study the masses of cnn^-s^-/css^-s^- states （n is u or d quark） in the chiral SU（3） quark model. The numerical results show that the mass of the mixed four-quark state （cnn^-s^-/css^-s^-） with spin parity j^P ： 0^＋ might not be Ds （2632）. At the same time, we also conclude that Dsj^＊（2317） and Dsj（2460） cannot be explained as the pure four-quark state.
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| 关 键 词： | 粒子物理学 夸克 四夸克态 手性对称 |
| 收稿时间： | 2007-03-01 |
Chiral SU(3) Quark Model Study of Tetraquark States: cnns/csss |
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| ZHANG Hai-Xia WANG Wen-Ling DAI Yuan-Ben ZHANG Zong-Ye. Chiral SU(3) Quark Model Study of Tetraquark States: cnns/csss[J]. Communications in Theoretical Physics, 2008, 49(2): 414-420 |
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| Authors: | ZHANG Hai-Xia WANG Wen-Ling DAI Yuan-Ben ZHANG Zong-Ye |
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| Affiliation: | 1. Institute of High Energy Physics, the Chinese Academy ofSciences, P.O. Box 918-4, Beijing 100049, China;2. Institute of Particle Physics, Central China Normal University, Wuhan 430079, China;3. Institute of Theoretical Physics, the Chinese Academy of Sciences, P.O. Box 2735, Beijing 100080, China |
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| Abstract: | The new members of the charm-strange family DsJ*(2317),DsJ(2460), and Ds(2632), which have the surprising properties, are challenging the present models. Many theoreticalinterpretations have been devoted to this issue. Most authorssuggest that they are not the conventional cs quark model states, but possibly are four-quark states, molecule states, ormixtures of a P-wave cs and a four-quark state. In this work,we follow the four-quark-state picture, and study the masses of cnns/csss states (n is u or d quark) inthe chiral SU(3) quark model. The numerical results show that themass of the mixed four-quark state (cnns/csss)with spin parity Jp=0+ might not be Ds(2632). At the sametime, we also conclude that DsJ*(2317) and DsJ(2460)cannot be explained as the pure four-quark state. |
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| Keywords: | four-quark states quark model chiral symmetry |
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