| Kaon electromagnetic form factor within the k(t) factorization formalism and it's light-cone wave function | |
| Wu, Xing-Gang1; Huang, Tao2 | |
| 刊名 | Journal of high energy physics
 |
| 2008-04-01 | |
| 期号 | 4页码:22 |
| 关键词 | Kaon physics Electromagnetic processes and properties Qcd |
| ISSN号 | 1029-8479 |
| 通讯作者 | Wu, xing-gang(wuxg@cqu.edu.cn) |
| 英文摘要 | 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. |
| WOS关键词 | HADRONIC CROSS-SECTIONS ; QUANTUM CHROMODYNAMICS ; EXCLUSIVE PROCESSES ; SUDAKOV SUPPRESSION ; PERTURBATIVE QCD ; QUARK-MODEL ; DECAY ; BEHAVIOR ; MESONS |
| WOS研究方向 | Physics |
| WOS类目 | Physics, Particles & Fields |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000255662900043 |
| 内容类型 | 期刊论文 |
| URI标识 | http://www.corc.org.cn/handle/1471x/2175909 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Wu, Xing-Gang |
| 作者单位 | 1.Chongqing Univ, Dept Phys, Chongqing 400044, Peoples R China 2.Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Xing-Gang,Huang, Tao. 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):22. |
| APA | Wu, Xing-Gang,&Huang, Tao.(2008).Kaon electromagnetic form factor within the k(t) factorization formalism and it's light-cone wave function.Journal of high energy physics(4),22. |
| MLA | Wu, Xing-Gang,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):22. |
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