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Coupled-channels study of Lambda K and Sigma K states in the chiral SU(3) quark model
Huang F(黄飞); Zhang D(张丹); Zhang ZY(张宗烨); Yu YW(余友文); Huang, F; Zhang, D; Zhang, ZY; Yu, YW
刊名PHYSICAL REVIEW C
2005
卷号71期号:6页码:64001
学科分类Physics
DOI10.1103/PhysRevC.71.064001
通讯作者CCAST, World Lab, Beijing 100080, Peoples R China ; Inst High Energy Phys, Beijing 100049, Peoples R China ; Chinese Acad Sci, Grad Sch, Beijing, Peoples R China
文章类型Article
英文摘要The S-wave Lambda K and Sigma K states with isospin I=1/2 are dynamically investigated within the framework of the chiral SU(3) quark model by solving a resonating group method equation. The model parameters are taken from our previous work, which gave a good description of the energies of the baryon ground states, the binding energy of the deuteron, and the experimental data of the nucleon-nucleon (NN) and nucleon-hyperon (NY) scattering. Assumed not to give important contributions in the scattering processes, the s-channel quark-antiquark (q (q) over bar) annihilation interactions are not included as a first step. The results show a strong attraction between Sigma and K, which consequently results in a Sigma K quasibound state with about 17-MeV binding energy, unlike the case of Lambda K, which is unbound. When the channel coupling of Lambda K and Sigma K is considered, a sharp resonance state near 1670 MeV with spin-parity J(P)=1/2(-) is found. The narrow gap of the Lambda K and Sigma K thresholds, the strong attraction between Sigma and K, and the sizable off-diagonal matrix elements of Lambda K and Sigma K are responsible for the appearance of this resonance.
类目[WOS]Physics, Nuclear
研究领域[WOS]Physics
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语种英语
WOS记录号WOS:000230275800006
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被引频次:24[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/311005/240726
专题院士_期刊论文
中国科学院高能物理研究所_多学科研究中心
作者单位中国科学院高能物理研究所
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Huang F,Zhang D,Zhang ZY,et al. Coupled-channels study of Lambda K and Sigma K states in the chiral SU(3) quark model[J]. PHYSICAL REVIEW C,2005,71(6):64001.
APA 黄飞.,张丹.,张宗烨.,余友文.,Huang, F.,...&Yu, YW.(2005).Coupled-channels study of Lambda K and Sigma K states in the chiral SU(3) quark model.PHYSICAL REVIEW C,71(6),64001.
MLA 黄飞,et al."Coupled-channels study of Lambda K and Sigma K states in the chiral SU(3) quark model".PHYSICAL REVIEW C 71.6(2005):64001.
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