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Hard scattering amplitude for the higher helicity components of the pion form factor
Cao FG(曹福广); Cao J(曹俊); 黄涛(理); Ma BQ(马伯强); Cao, FG; Cao, J; Huang, T; Ma, BQ
1997
发表期刊PHYSICAL REVIEW D
卷号55期号:11页码:7107-7113
通讯作者CCAST,WORLD LAB,BEIJING 100080,PEOPLES R CHINA ; ACAD SINICA,INST HIGH ENERGY PHYS,BEIJING 100039,PEOPLES R CHINA
文章类型Article
摘要For obtaining the spin space wave function of the pion meson in the light-cone formalism from the naive quark model, it is necessary to take into account the Wigner rotation. Consequently there are higher helicity (lambda(1) + lambda(2) = +/- 1) components in the light-cone spin space wavefunction of pion in addition to the usual helicity (lambda(1) + lambda(2) = 0) components. For the pion electromagnetic form factor, we calculate the hard-scattering amplitude for the higher helicity components in light-cone perturbation theory. It is found that the hard-scattering amplitude for the higher helicity components is of order 1/Q(4), which is vanishingly small compared to that of the ordinary helicity components at very high Q(2) but should be considered in the Q(2) region where experimental data are available.
学科领域Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.55.7107
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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:A1997XD01800041
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240103
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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Cao FG,Cao J,Huang T,et al. Hard scattering amplitude for the higher helicity components of the pion form factor[J]. PHYSICAL REVIEW D,1997,55(11):7107-7113.
APA 曹福广.,曹俊.,黄涛.,马伯强.,Cao, FG.,...&Ma, BQ.(1997).Hard scattering amplitude for the higher helicity components of the pion form factor.PHYSICAL REVIEW D,55(11),7107-7113.
MLA 曹福广,et al."Hard scattering amplitude for the higher helicity components of the pion form factor".PHYSICAL REVIEW D 55.11(1997):7107-7113.
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