The longitudinal and transverse distributions of the pion wave function from the present experimental data on the pion-photon transition form factor
Zhong, T; Wu, XG; Huang T(黄涛); Huang, T
刊名EUROPEAN PHYSICAL JOURNAL C
2016
卷号76期号:7
DOI10.1140/epjc/s10052-016-4236-0
通讯作者黄涛(理)
文章类型Article
英文摘要The low-energy and high-energy behavior of the pion-photon transition form factor F-pi gamma (Q(2)) are sensitive to the transverse and longitudinal distributions of the pion wave function, respectively. Acareful study of F-pi gamma (Q(2)) shall thus provide helpful constraints on the properties of the pion wave function. In this paper, we present a combined analysis of the data on F-pi gamma (Q(2)) reported by the CELLO, the CLEO, the BABAR, and the BELLE Collaborations. It is performed by using the method of least squares. By using the combined measurements of the BELLE and CLEO Collaborations, the pion wave function longitudinal and transverse behavior can be fixed to a certain degree, i.e. we obtain beta is an element of [0.691, 0.757] GeV and B is an element of [0.00, 0.235] for P-chi 2 >= 90 %, where beta and B are two parameters of a convenient pion wave function model. It is noted that the distribution amplitude of such a pion wave function can mimic various longitudinal behaviors, as suggested in the literature under a proper choice of parameters. We observe that the CELLO, CLEO, and BELLE data are consistent with each other, all of which prefer the asymptotic-like distribution amplitude; while the BABAR data prefers a more broad distribution amplitude, such as the CZ-like one.
关键词[WOS]LIGHT-CONE FORMALISM ; GAMMA-ASTERISK-GAMMA ; QCD SUM-RULES ; DISTRIBUTION AMPLITUDES ; EXCLUSIVE PROCESSES ; MESON ; MOMENTUM ; HEAVY
语种英语
WOS记录号WOS:000379753500001
引用统计
被引频次:2[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/311005/260635
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_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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Zhong, T,Wu, XG,Huang T,et al. The longitudinal and transverse distributions of the pion wave function from the present experimental data on the pion-photon transition form factor[J]. EUROPEAN PHYSICAL JOURNAL C,2016,76(7).
APA Zhong, T,Wu, XG,黄涛,&Huang, T.(2016).The longitudinal and transverse distributions of the pion wave function from the present experimental data on the pion-photon transition form factor.EUROPEAN PHYSICAL JOURNAL C,76(7).
MLA Zhong, T,et al."The longitudinal and transverse distributions of the pion wave function from the present experimental data on the pion-photon transition form factor".EUROPEAN PHYSICAL JOURNAL C 76.7(2016).
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