Model for the twist-3 wave function of the pion and its contribution to the pion form factor

doi:10.1103/PhysRevD.70.093013

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	Model for the twist-3 wave function of the pion and its contribution to the pion form factor
	黄涛(理); Wu XG(吴兴刚); Huang, T; Wu, XG
	2004
发表期刊	PHYSICAL REVIEW D
卷号	70 期号:9 页码:93013
通讯作者	Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
文章类型	Article
摘要	A model for the twist-3 wave function psi(p)(x,k(perpendicular to)) of the pion has been constructed based on the moment calculation by applying the QCD sum rules, whose distribution amplitude has a better end-point behavior than that of the asymptotic one. With this model wave function, the twist-3 contributions including both the usual helicity components (lambda(1)+lambda(2)=0) and the higher helicity components (lambda(1)+lambda(2)=+/-1) to the pion form factor have been studied within the modified pQCD approach. Our results show that the twist-3 contribution drops fast and it becomes less than the twist-2 contribution at Q(2)similar to10 GeV2. The higher helicity components in the twist-3 wave function will give an extra suppression to the pion form factor. The model dependence of the twist-3 contribution to the pion form factor has been studied by comparing four different models. When all the power contributions, which include higher order in alpha(s), higher helicities, higher twists in DA and, etc., have been taken into account, it is expected that the hard contributions will fit the present experimental data well at the energy region where pQCD is applicable.
学科领域	Astronomy & Astrophysics; Physics
DOI	10.1103/PhysRevD.70.093013
URL	查看原文
收录类别	INSPIREHEP ; ADS
语种	英语
WOS研究方向	Astronomy & Astrophysics ; Physics
WOS类目	Astronomy & Astrophysics ; Physics, Particles & Fields
WOS记录号	WOS:000225440600034
ADS Bibcode	2004PhRvD..70i3013H
ADS URL	https://ui.adsabs.harvard.edu/abs/2004PhRvD..70i3013H
ADS引文	https://ui.adsabs.harvard.edu/abs/2004PhRvD..70i3013H/citations
INSPIRE ID	657214
INSPIRE URL	https://inspirehep.net/literature/657214
引用统计	正在获取... 被引频次：49 [INSPIRE] 被引频次：56 [ADS]
文献类型	期刊论文
条目标识符	https://ir.ihep.ac.cn/handle/311005/240851
专题	理论物理室
作者单位	中国科学院高能物理研究所
第一作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Huang T,Wu XG,Huang, T,et al. Model for the twist-3 wave function of the pion and its contribution to the pion form factor[J]. PHYSICAL REVIEW D,2004,70(9):93013.
APA	黄涛,吴兴刚,Huang, T,&Wu, XG.(2004).Model for the twist-3 wave function of the pion and its contribution to the pion form factor.PHYSICAL REVIEW D,70(9),93013.
MLA	黄涛,et al."Model for the twist-3 wave function of the pion and its contribution to the pion form factor".PHYSICAL REVIEW D 70.9(2004):93013.