| Diquark Structure of Pentaquark in the Quark Delocalization Colour Screening Model |
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| 作者姓名： | 黄虹霞 龚丽英 平加伦 |
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| 作者单位： | [1]Department of Physics, Nanjing Normal University, Nanjing 210097 [2]School of Physics and Microelectronics, Shandong University, Jinan 250100 |
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| 基金项目： | Supported by the National Natural Science Foundation of China, and the 333 Project of Jiangsu Province. |
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| 摘 要： | In the framework of quark-delocalization, colour-screening model, the diquark structure of pentaquark θ^＋ is studied in detail under the adiabatic approximation. The calculation is carried out by using the fractional parentage expansion technique, which greatly simplify the calculation of the matrix elements of Hamiltonian. The results show that the ground state of the pentaquark has negative parity rather than positive parity, which was proposed by daffe-Wilczek. However the mass obtained is about 1651 MeV which is still higher than the observed mass 1540 MeV.
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| 关 键 词： | 粒子物理 夸克 绝热系数 Hamiltonian矩阵 |
| 收稿时间： | 2005-07-22 |
| 修稿时间： | 2005-07-22 |
Diquark Structure of Pentaquark in the Quark Delocalization Colour Screening Model |
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| HUANG Hong-Xia, GONG Li-Ying, PING Jia-Lun.Diquark Structure of Pentaquark in the Quark Delocalization Colour Screening Model[J].Chinese Physics Letters,2005,22(11):2784-2787. |
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| Authors: | HUANG Hong-Xia GONG Li-Ying PING Jia-Lun |
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