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题名: Understanding light scalar meson by color-magnetic wave function in QCD sum rule
作者: Pang, Yi ;  Yan, Mu-Lin
刊名: EUROPEAN PHYSICAL JOURNAL A
出版日期: 2009
卷号: 42, 期号:2, 页码:195-212
关键词: 4-QUARK STATES ;  MULTIQUARK HADRONS ;  GLUON CONDENSATE ;  BOUND-STATE ;  QUARK-MODEL ;  TETRAQUARK ;  PHYSICS ;  MASSES
学科分类: Physics
通讯作者: Pang, Y , Chinese Acad Sci, Kavli Inst Theoret Phys China, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
部门归属: [Pang, Y] Chinese Acad Sci, Kavli Inst Theoret Phys China, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China; [Yan, ML] Univ Sci & Technol China, Interdisciplinary Ctr Theoret Studies, Hefei 230026, Anhui, Peoples R China
英文摘要: In this paper, we study the 0(+) nonet mesons as tetraquark states with interpolating currents inspired by the color-magnetic wave function. This wave function is the eigenfunction of an effective color-magnetic Hamiltonian with the lowest eigenvalue, meaning that the state depicted by this wave function is the most stable one and is the most probable to be observed in experiments. We perform an OPE calculation up to dimension-eight condensates and find that the best QCD sum rule is achieved when the current inspired by the color-magnetic wave function is a proper mixture of the tensor and pseudoscalar diquark-antidiquark bound states. Compared with previous results, to sigma(600) and kappa(800), our results appear better, due to larger pole contribution. The direct instanton contributions are also considered, which yields a consistent result with previous OPE results. Finally, we also discuss the eta' problem as a possible six-quark state.
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000271645100009
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5219
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Pang, Yi,Yan, Mu-Lin. Understanding light scalar meson by color-magnetic wave function in QCD sum rule[J]. EUROPEAN PHYSICAL JOURNAL A,2009,42(2):195-212.
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