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题名: Mixing of the low-lying three- and five-quark Omega states with negative parity
作者: An, CS ;  Metsch, BC ;  Zou, BS
刊名: PHYSICAL REVIEW C
出版日期: 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
学科分类: Physics
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.
部门归属: [An, C. S.; Zou, B. S.] Chinese Acad Sci, Ctr Sci Facil, Inst High Energy Phys & Theoret Phys, Beijing 100049, Peoples R China; [An, C. S.; Metsch, B. Ch.] Univ Bonn, Helmholtz Inst Strahlen & Kernphys, D-53115 Bonn, Germany; [Zou, B. S.] Chinese Acad Sci, Inst Theoret Phys, State Key Lab Theoret Phys, Beijing 100190, 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.
资助者: 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]
收录类别: SCI
原文出处: 查看原文
语种: 英语
WOS记录号: WOS:000321000700004
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/15341
Appears in Collections:理论物理所2013年知识产出 _期刊论文

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Recommended Citation:
An, CS,Metsch, BC,Zou, BS. Mixing of the low-lying three- and five-quark Omega states with negative parity[J]. PHYSICAL REVIEW C,2013,87(6).
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