Diquark Structure of Pentaquark in the Quark Delocalization Colour Screening Model
HUANG Hong-Xia1 , GONG Li-Ying1 , PING Jia-Lun1,2
1 Department of Physics, Nanjing Normal University, Nanjing 210097
2 School of Physics and Microelectronics, Shandong University, Jinan 250100
Diquark Structure of Pentaquark in the Quark Delocalization Colour Screening Model
HUANG Hong-Xia1 ;GONG Li-Ying1 ;PING Jia-Lun1,2
1 Department of Physics, Nanjing Normal University, Nanjing 210097
2 School of Physics and Microelectronics, Shandong University, Jinan 250100
关键词 ：
12.39.Mk ,
12.39.Jh
Abstract ：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 Jaffe--Wilczek. However the mass obtained is about 1651MeV which is still higher than the observed mass 1540MeV.
Key words ：
12.39.Mk
12.39.Jh
出版日期: 2005-11-01
:
12.39.Mk
(Glueball and nonstandard multi-quark/gluon states)
12.39.Jh
(Nonrelativistic quark model)
引用本文:
HUANG Hong-Xia;GONG Li-Ying;PING Jia-Lun;. Diquark Structure of Pentaquark in the Quark Delocalization Colour Screening Model[J]. 中国物理快报, 2005, 22(11): 2784-2787.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y2005/V22/I11/2784
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2005, Vol. 22 
