Further study on 5q configuration states in the chiral SU(3) quark model

	Further study on 5q configuration states in the chiral SU(3) quark model
	Zhang D(张丹); Huang F(黄飞); Zhang ZY(张宗烨); Yu YW(余友文); Zhang, D; Huang, F; Zhang, ZY; Yu, YW
刊名	NUCLEAR PHYSICS A
	2005
卷号	756 期号:1-2 页码:#REF!
关键词	Pentaquark state quark model chiral symmetry
通讯作者	Zhang, D (reprint author), Inst High Energy Phys, POB 918-4, Beijing 100049, Peoples R China.
英文摘要	The structure of the 5q configuration states with strangeness S = +1 is further studied in the chiral SU(3) quark model based on our previous work. We calculate the energies of fifteen low configurations of the 5q system, four lowest configurations of J(pi) = (1)/(-)(2) with 4q partition [4]orb (0s(4)) [3 1]of, four of J(pi) (1)/(+)(2) with 4q partition [31]orb (0s(3)0p)[4](sigma f) and seven of J(pi) = (1)/(+)(2) with 4q partition [4](orb) (0s(3)0p)[31](sigma f). Some modifications are made in this further study, i.e., the orbital wave function is extended as an expansion of 4 different size harmonic oscillator forms; three various forms (quadratic, linear and error function form) of the color confinement potential are considered; the states with 4q partition [4](orb)(0s(3)0p) [31](sigma f) are added, which are unnegligible in the J(pi) = (1)/(+)(2) case and were not considered in our previous paper, further the mixing between configurations [31](orb)(0s(3)0p)[4](sigma f) and [4]orb (0s(3)0p)[31](sigma f) is also investigated. The results show that the T = 0 state is still always the lowest one for both J(pi) = (1)/(-)(2) and J(pi) = (1)/(+)(2) states, and J(pi) = (1)/(-)(2), T = 0 state is always lower than that of J(pi) = (1)/(+)(2), All of these modifications can only offer several tens to hundred MeV effect, and the theoretical value of the lowest state is still about 245 MeV higher than the experimental mass of theta(+). It seems to be difficult to get the calculated mass close to the observed one with the reasonable parameters in the framework of the chiral SU(3) quark model when the model space is chosen as a 5q cluster. (c) 2005 Elsevier B.V. All rights reserved.
学科主题	Physics
类目[WOS]	Physics, Nuclear
收录类别	SCI
WOS记录号	WOS:000229922700010
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/226997]
专题	高能物理研究所_院士高能物理研究所_多学科研究中心
推荐引用方式 GB/T 7714	Zhang D,Huang F,Zhang ZY,et al. Further study on 5q configuration states in the chiral SU(3) quark model[J]. NUCLEAR PHYSICS A,2005,756(1-2):#REF!.
APA	张丹.,黄飞.,张宗烨.,余友文.,Zhang, D.,...&Yu, YW.(2005).Further study on 5q configuration states in the chiral SU(3) quark model.NUCLEAR PHYSICS A,756(1-2),#REF!.
MLA	张丹,et al."Further study on 5q configuration states in the chiral SU(3) quark model".NUCLEAR PHYSICS A 756.1-2(2005):#REF!.