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Kaon electromagnetic form factor within the k(T) factorization formalism and it's light-cone wave function
Wu, XG; 黄涛(理); Huang, T
2008
发表期刊JOURNAL OF HIGH ENERGY PHYSICS
期号4页码:43
通讯作者[Wu, Xing-Gang] Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China ; [Huang, Tao] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
摘要We present a systematical study on the kaon electromagnetic form factors F-K +/-,K-0,(K) over bar (0)(Q(2)) within the k(T) factorization formalism, where the transverse momentum effects, the contributions from the different helicity components and different twist structures of the kaon light-cone (LC) wave function are carefully analyzed for giving a well understanding of the hard contributions at the energy region where pQCD is applicable. The right power behavior of the hard contribution from the higher helicity components and from the higher twist structures can be obtained by keeping the kT dependence in the hard amplitude. Our results show that the kT dependence in LC wave function affects the hard and soft contributions substantially and the power-suppressed terms (twist-3 and higher helicity components) make an important contribution below Q(2) similar to several GeV2 although they drop fast as Q(2) increasing. The parameters of the proposed model wave function can be fixed by the first two moments of its distribution amplitude and other conditions. By varying the first two moments a(1)(K) (1GeV) and a(2)(K) (1GeV) with the region of 0.05 +/- 0.02 and 0.10 +/- 0.05 respectively, we find that the uncertainty of the kaon electromagnetic form factor is rather small.
文章类型Article
关键词kaon physics electromagnetic processes and properties QCD
学科领域Physics
研究领域[WOS]Physics
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语种英语
WOS类目Physics, Particles & Fields
WOS记录号WOS:000255662900043
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文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/240375
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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Wu, XG,Huang T,Huang, T. Kaon electromagnetic form factor within the k(T) factorization formalism and it's light-cone wave function[J]. JOURNAL OF HIGH ENERGY PHYSICS,2008(4):43.
APA Wu, XG,黄涛,&Huang, T.(2008).Kaon electromagnetic form factor within the k(T) factorization formalism and it's light-cone wave function.JOURNAL OF HIGH ENERGY PHYSICS(4),43.
MLA Wu, XG,et al."Kaon electromagnetic form factor within the k(T) factorization formalism and it's light-cone wave function".JOURNAL OF HIGH ENERGY PHYSICS .4(2008):43.
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