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

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	Mixing of the low-lying three- and five-quark Omega states with negative parity
	Zou, BS
刊名	PHYSICAL REVIEW C
	2013
卷号	87 期号:6
关键词	RELATIVISTIC QUARK-MODEL PAIR-CREATION MODEL K-P INTERACTIONS HYPERFINE INTERACTIONS BARYON SPECTRUM SCALAR MESONS 11 GEV/C DECAYS FORCES BREAKING
ISSN号	0556-2813
通讯作者	An, CS (reprint author), Chinese Acad Sci, Ctr Sci Facil, Inst High Energy Phys & Theoret Phys, Beijing 100049, Peoples R China.
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
资助信息	National Natural Science Foundation of China [11205164, 11035006, 11121092, 11261130311]; DFG [CRC110]; NSFC [CRC110]; Chinese Academy of Sciences [KJCX2-EW-N01]; Ministry of Science and Technology of China [2009CB825200]
原文出处	http://dx.doi.org/10.1103/PhysRevC.87.065207
语种	英语
WOS记录号	WOS:000321000700004
公开日期	2014-04-25
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/15341]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Zou, BS. Mixing of the low-lying three- and five-quark Omega states with negative parity[J]. PHYSICAL REVIEW C,2013,87(6).
APA	Zou, BS.(2013).Mixing of the low-lying three- and five-quark Omega states with negative parity.PHYSICAL REVIEW C,87(6).
MLA	Zou, BS."Mixing of the low-lying three- and five-quark Omega states with negative parity".PHYSICAL REVIEW C 87.6(2013).