Determination of the eta and eta

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	Determination of the eta and eta
	Huang, Tao; Wu, Xing-Gang; Huang, T , Chinese Acad Sci, Inst High Energy Phys, POB 918,4, Beijing 100039, Peoples R China
刊名	EUROPEAN PHYSICAL JOURNAL C
	2007
卷号	50 期号:4 页码:771-779
关键词	Quantum Chromodynamics Symmetry-breaking Decay Constants Mesons
ISSN号	1434-6044
英文摘要	The possible range of the eta-eta' mixing angle is determined from the transition form factors F-eta gamma(Q(2)) and F-eta'gamma (Q(2)) with the help of up-to-date experimental data. For this purpose, the quark-flavor mixing scheme is adopted and the pseudoscalar transition form factors are calculated in the framework of light-cone pQCD, in which the transverse-momentum corrections and the contributions beyond the leading Fock state have been carefully taken into consideration. We construct a phenomenological expression to estimate the contributions to the form factors beyond the leading Fock state, based on their asymptotic behavior at Q(2) -> 0 and Q(2) -> infinity. By taking the quark-flavor mixing scheme, our results lead to phi = 38.0 degrees +/- 1.0 degrees +/- 2.0 degrees, where the first error comes from the experimental uncertainty and the second error from the uncertainties of the parameters of the wavefunction. The possible intrinsic charm component in eta and eta' is discussed, and our present analysis also disfavors a large intrinsic charm component in eta and eta', e.g. vertical bar f(eta')(c)vertical bar <= 50 MeV.
学科主题	Physics
URL标识	查看原文
公开日期	2012-08-02
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/5737]
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	Huang, T , Chinese Acad Sci, Inst High Energy Phys, POB 918,4, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Huang, Tao,Wu, Xing-Gang,Huang, T , Chinese Acad Sci, Inst High Energy Phys, POB 918,4, Beijing 100039, Peoples R China. Determination of the eta and eta[J]. EUROPEAN PHYSICAL JOURNAL C,2007,50(4):771-779.
APA	Huang, Tao,Wu, Xing-Gang,&Huang, T , Chinese Acad Sci, Inst High Energy Phys, POB 918,4, Beijing 100039, Peoples R China.(2007).Determination of the eta and eta.EUROPEAN PHYSICAL JOURNAL C,50(4),771-779.
MLA	Huang, Tao,et al."Determination of the eta and eta".EUROPEAN PHYSICAL JOURNAL C 50.4(2007):771-779.