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Novel insights into the gamma gamma* -> pi(0) transition form factor
Guo ZK(郭泽坤); 赵强;Guo, ZK; Zhao, Q
2012
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号72期号:4页码:1964
摘要BaBar's observation of significant deviations of the pion transition form factor (TFF) from the asymptotic expectation with Q(2) > 9 GeV2 has brought about a serious crisis to the fundamental picture established for such a simple q (q) over bar system by perturbative QCD, i.e. the dominance of collinear factorization at high momentum transfers for the pion TFF. We show that non-factorizable contributions due to open flavors in gamma gamma* -> pi(0) could be an important source that contaminates the pQCD asymptotic limit and causes such deviations with Q2 > 9 GeV2. Within an effective Lagrangian approach, the non-factorizable amplitudes can be related to intermediate hadron loops, i.e. K-(*()) and D-(*()) etc., and their corrections to the pi(0) and eta TFFs can be estimated.
学科领域Physics
DOI10.1140/epjc/s10052-012-1964-7
收录类别SCI
WOS记录号WOS:000304013800027
引用统计
被引频次:3[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/311005/224453
专题理论物理室
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GB/T 7714
Guo ZK,赵强;Guo, ZK,Zhao, Q. Novel insights into the gamma gamma* -> pi(0) transition form factor[J]. EUROPEAN PHYSICAL JOURNAL C,2012,72(4):1964.
APA 郭泽坤,赵强;Guo, ZK,&Zhao, Q.(2012).Novel insights into the gamma gamma* -> pi(0) transition form factor.EUROPEAN PHYSICAL JOURNAL C,72(4),1964.
MLA 郭泽坤,et al."Novel insights into the gamma gamma* -> pi(0) transition form factor".EUROPEAN PHYSICAL JOURNAL C 72.4(2012):1964.
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