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题名: Determination of the eta and eta
作者: Huang, Tao ;  Wu, Xing-Gang
刊名: EUROPEAN PHYSICAL JOURNAL C
出版日期: 2007
卷号: 50, 期号:4, 页码:771-779
关键词: QUANTUM CHROMODYNAMICS ;  SYMMETRY-BREAKING ;  DECAY CONSTANTS ;  MESONS
学科分类: Physics
通讯作者: Huang, T , Chinese Acad Sci, Inst High Energy Phys, POB 918,4, Beijing 100039, Peoples R China
部门归属: 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
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.
收录类别: SCI
原文出处: 查看原文
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5737
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Huang, Tao,Wu, Xing-Gang. Determination of the eta and eta[J]. EUROPEAN PHYSICAL JOURNAL C,2007,50(4):771-779.
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文件名: Determination of the eta and eta mixing angle from the pseudoscalar transition form factors.pdf
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