Diquark Structure of Pentaquark in the Quark Delocalization Colour Screening Model

Chin. Phys. Lett.

2005, Vol. 22

Issue (11): 2784-2787 DOI:

Original Articles

Diquark Structure of Pentaquark in the Quark Delocalization Colour Screening Model

HUANG Hong-Xia¹;GONG Li-Ying¹;PING Jia-Lun^1,2

¹Department of Physics, Nanjing Normal University, Nanjing 210097 ²School of Physics and Microelectronics, Shandong University, Jinan 250100

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HUANG Hong-Xia, GONG Li-Ying, PING Jia-Lun 2005 Chin. Phys. Lett. 22 2784-2787

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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.

Keywords: 12.39.Mk 12.39.Jh

Published: 01 November 2005

PACS:	12.39.Mk	(Glueball and nonstandard multi-quark/gluon states)
	12.39.Jh	(Nonrelativistic quark model)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2005/V22/I11/02784

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