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Determination of the eta and eta ' mixing angle from the pseudoscalar transition form factors
黄涛(理); Wu XG(吴兴刚); Huang, T; Wu, XG
2007
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号50期号:4页码:771-779
通讯作者Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China ; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China ; Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China
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.
文章类型Article
学科领域Physics
研究领域[WOS]Physics
DOI10.1140/epjc/s10052-007-0245-3
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语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000246100600001
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被引频次:20[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/238459
专题理论物理室
作者单位中国科学院高能物理研究所
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GB/T 7714
Huang T,Wu XG,Huang, T,et al. Determination of the eta and eta ' mixing angle from the pseudoscalar transition form factors[J]. EUROPEAN PHYSICAL JOURNAL C,2007,50(4):771-779.
APA 黄涛,吴兴刚,Huang, T,&Wu, XG.(2007).Determination of the eta and eta ' mixing angle from the pseudoscalar transition form factors.EUROPEAN PHYSICAL JOURNAL C,50(4),771-779.
MLA 黄涛,et al."Determination of the eta and eta ' mixing angle from the pseudoscalar transition form factors".EUROPEAN PHYSICAL JOURNAL C 50.4(2007):771-779.
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