| 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
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| 2007
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| 发表期刊 | EUROPEAN PHYSICAL JOURNAL C
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| 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
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| 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
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| 学科领域 | Physics
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| 研究领域[WOS] | Physics
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| DOI | 10.1140/epjc/s10052-007-0245-3
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| URL | 查看原文
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| 语种 | 英语
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| WOS类目 | Physics, Particles & Fields
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| WOS记录号 | WOS:000246100600001
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://ir.ihep.ac.cn/handle/311005/238459
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| 专题 | 理论物理室
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| 作者单位 | 中国科学院高能物理研究所
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推荐引用方式
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.
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| 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.
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| 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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