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Pang, Yi; Yan, Mu-Lin; Pang, Y , Chinese Acad Sci, Kavli Inst Theoret Phys China, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
Understanding light scalar meson by color-magnetic wave function in QCD sum rule
Source PublicationEUROPEAN PHYSICAL JOURNAL A
Keyword4-quark States Multiquark Hadrons Gluon Condensate Bound-state Quark-model Tetraquark Physics Masses
AbstractIn 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.
2009
ISSN1434-6001
Volume42Issue:2Pages:195-212
Subject AreaPhysics
Indexed BySCI
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5219
Collection理论物理所科研产出_SCI论文
Corresponding AuthorPang, Y , Chinese Acad Sci, Kavli Inst Theoret Phys China, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Pang, Yi,Yan, Mu-Lin,Pang, Y , Chinese Acad Sci, Kavli Inst Theoret Phys China, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China. Understanding light scalar meson by color-magnetic wave function in QCD sum rule[J]. EUROPEAN PHYSICAL JOURNAL A,2009,42(2):195-212.
APA Pang, Yi,Yan, Mu-Lin,&Pang, Y , Chinese Acad Sci, Kavli Inst Theoret Phys China, Key Lab Frontiers Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China.(2009).Understanding light scalar meson by color-magnetic wave function in QCD sum rule.EUROPEAN PHYSICAL JOURNAL A,42(2),195-212.
MLA Pang, Yi,et al."Understanding light scalar meson by color-magnetic wave function in QCD sum rule".EUROPEAN PHYSICAL JOURNAL A 42.2(2009):195-212.
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