Mixing of the low-lying three- and five-quark Omega states with negative parity

	Mixing of the low-lying three- and five-quark Omega states with negative parity
	An CS(安春生); An, CS; Zou BS(邹冰松); Metsch, BC; Zou, BS
刊名	PHYSICAL REVIEW C
	2013
卷号	87 期号:6 页码:65207
英文摘要	Mixing of the low-lying three- and five-quark Omega states with spin-parity quantum numbers 1/2(-) and 3/2(-) is investigated, employing an instanton-induced quark-antiquark pair creation model, which precludes transitions between s(3) and s(4)(s) over bar configurations. Models with hyperfine interactions between quarks are of three different kinds, namely, one-gluon-exchange (OGE), Goldstone-boson-exchange (GBE), and an instanton-induced interaction (INS). Numerical results show that the instanton-induced pair creation causes strong mixing between the three- and five-quark configurations with spin 3/2, and that this mixing decreases the energy of the lowest spin 3/2 states in all three different hyperfine interaction models to similar to 1750 +/- 50 MeV. On the other hand, transition couplings between s(3) and s(3)q (q) over bar states with spin 1/2 caused by instanton-induced q (s) over bar creation is very small and the resulting mixing of three- and five-quark configurations in the OGE and INS models is negligible, while the mixing of the spin 1/2 states in GBE model is not; but effects of this mixing on energies of mixed states are also very small. Accordingly, the lowest Omega states with negative parity in all three hyperfine interactions models have spin 3/2.
学科主题	Physics
收录类别	SCI
WOS记录号	WOS:000321000700004
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/224773]
专题	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	An CS,An, CS,Zou BS,et al. Mixing of the low-lying three- and five-quark Omega states with negative parity[J]. PHYSICAL REVIEW C,2013,87(6):65207.
APA	安春生,An, CS,邹冰松,Metsch, BC,&Zou, BS.(2013).Mixing of the low-lying three- and five-quark Omega states with negative parity.PHYSICAL REVIEW C,87(6),65207.
MLA	安春生,et al."Mixing of the low-lying three- and five-quark Omega states with negative parity".PHYSICAL REVIEW C 87.6(2013):65207.