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Implication on the pion distribution amplitude from the pion-photon transition form factor with the new BABAR data
Wu, XG; 黄涛(理); Huang, T
2010
发表期刊PHYSICAL REVIEW D
卷号82期号:3页码:34024
通讯作者[Wu, Xing-Gang] Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China ; [Huang, Tao] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Huang, Tao] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
摘要The new BABAR data on the pion-photon transition form factor arouses people's interest for the determination of the pion distribution amplitude. To explain the data, we take both the leading valence quark state's and the nonvalence quark state's contributions into consideration, where the valence quark part up to next-to-leading order is presented and the nonvalence quark part is estimated by a phenomenological model based on its limiting behavior at both Q(2) -> 0 and Q(2) -> infinity. Our results show that to be consistent with the new BABAR data at the large Q(2) region, a broader amplitude other than the asymptoticlike pion distribution amplitude should be adopted. The broadness of the pion distribution amplitude is controlled by a parameter B. It has been found that the new BABAR data at low and high energy regions can be explained simultaneously by setting B to be around 0.60, in which the pion distribution amplitude is closed to the Chernyak-Zhitnitsky form.
文章类型Article
学科领域Astronomy & Astrophysics; Physics
研究领域[WOS]Astronomy & Astrophysics ; Physics
DOI10.1103/PhysRevD.82.034024
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语种英语
WOS类目Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号WOS:000281070600005
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被引频次:44[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/311005/240560
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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Wu, XG,Huang T,Huang, T. Implication on the pion distribution amplitude from the pion-photon transition form factor with the new BABAR data[J]. PHYSICAL REVIEW D,2010,82(3):34024.
APA Wu, XG,黄涛,&Huang, T.(2010).Implication on the pion distribution amplitude from the pion-photon transition form factor with the new BABAR data.PHYSICAL REVIEW D,82(3),34024.
MLA Wu, XG,et al."Implication on the pion distribution amplitude from the pion-photon transition form factor with the new BABAR data".PHYSICAL REVIEW D 82.3(2010):34024.
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