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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
2005
发表期刊NUCLEAR PHYSICS A
卷号756期号:1-2页码:#REF!
通讯作者Zhang, D (reprint author), Inst High Energy Phys, POB 918-4, Beijing 100049, Peoples R China.
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.
文章类型Article
关键词Pentaquark state quark model chiral symmetry
学科领域Physics
DOI10.1016/j.nuclphysa.2005.03.087
收录类别SCI
WOS类目Physics, Nuclear
WOS记录号WOS:000229922700010
引用统计
被引频次:9[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/226997
专题院士
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!.
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