Understanding light scalar meson by color-magnetic wave function in QCD sum rule

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	Understanding light scalar meson by color-magnetic wave function in QCD sum rule
	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
刊名	EUROPEAN PHYSICAL JOURNAL A
	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
ISSN号	1434-6001
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.
学科主题	Physics
URL标识	查看原文
WOS记录号	WOS:000271645100009
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5219]
专题	理论物理研究所_理论物理所1978-2010年知识产出
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
推荐引用方式 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.