| 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
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| 2004 | |
| Source Publication | PHYSICAL REVIEW D
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| Volume | 70Issue:9Pages:93013 |
| Corresponding Author | Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China |
| Subtype | Article |
| Abstract | 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. |
| Subject Area | Astronomy & Astrophysics; Physics |
| DOI | 10.1103/PhysRevD.70.093013 |
| URL | 查看原文 |
| Indexed By | INSPIREHEP ; ADS |
| Language | 英语 |
| WOS Research Area | Astronomy & Astrophysics ; Physics |
| WOS Subject | Astronomy & Astrophysics ; Physics, Particles & Fields |
| WOS ID | WOS:000225440600034 |
| ADS Bibcode | 2004PhRvD..70i3013H |
| ADS URL | https://ui.adsabs.harvard.edu/abs/2004PhRvD..70i3013H |
| ADS CITATIONS | https://ui.adsabs.harvard.edu/abs/2004PhRvD..70i3013H/citations |
| inspireid | 657214 |
| inspireURL | https://inspirehep.net/literature/657214 |
| Citation statistics |
Cited Times:49 [INSPIRE]
Cited Times:53 [ADS]
|
| Document Type | 期刊论文 |
| Identifier | http://ir.ihep.ac.cn/handle/311005/240851 |
| Collection | 理论物理室 |
| Affiliation | 中国科学院高能物理研究所 |
| First Author Affilication | Institute of High Energy |
| Recommended Citation 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. |
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