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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
Source PublicationEUROPEAN PHYSICAL JOURNAL C
KeywordQuantum Chromodynamics Symmetry-breaking Decay Constants Mesons
AbstractThe 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.
2007
ISSN1434-6044
Volume50Issue:4Pages:771-779
Subject AreaPhysics
Indexed BySCI
Document Type期刊论文
Identifierhttp://ir.itp.ac.cn/handle/311006/5737
Collection理论物理所科研产出_SCI论文
Corresponding AuthorHuang, T , Chinese Acad Sci, Inst High Energy Phys, POB 918,4, Beijing 100039, Peoples R China
Recommended Citation
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.
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