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gamma*rho(0) -> pi(0) transition form factor in extended AdS/QCD models
Zuo, F; Jia Y(贾宇); 黄涛(理); Jia, Y; Huang, T
2010
发表期刊EUROPEAN PHYSICAL JOURNAL C
卷号67期号:1-2页码:#REF!
通讯作者Zuo, F (reprint author), Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China.
文章类型Article
摘要The gamma*rho(0) -> pi(0) transition form factor is extracted from recent result for the gamma*gamma*pi(0) form factor obtained in the extended hard-wall AdS/QCD model with a Chern-Simons term. In the large momentum region, the form factor exhibits a 1/Q(4) behavior, in accordance with the perturbative QCD analysis, and also with the Light-Cone Sum Rule (LCSR) result if the pion wave function exhibits the same endpoint behavior as the asymptotic one. The appearance of this power behavior from the AdS side and the LCSR approach seem to be rather similar: both of them come from the "soft" contributions. Comparing the expressions for the form factor in both sides, one can obtain the duality relation z proportional to root u(1 - u), which is compatible with one of the most important relations of the Light-Front holography advocated by Brodsky and de Teramond. In the moderate Q(2) region, the comparison of the numerical results from both approaches also supports a asymptotic-like pion wave function, in accordance with previous studies for the gamma*gamma*pi(0) form factor. The form factor at zero momentum transfer gives the. gamma*rho(0)pi(0) coupling constant, from which one can determine the partial width for the rho(0)(omega) -> pi(0)gamma decay. We also calculate the form factor in the time-like region, and study the corresponding Dalitz decays rho(0)(omega) -> pi(0)e(+)e(-), pi(0)mu(+)mu(-). Although all these results are obtained in the chiral limit, numerical calculations with finite quark masses show that the corrections are extremely small. Some of these calculations are repeated in the Hirn-Sanz model and similar results are obtained.
学科领域Physics
DOI10.1140/epjc/s10052-010-1277-7
收录类别SCI
WOS类目Physics, Particles & Fields
WOS记录号WOS:000277300300021
引用统计
被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/227215
专题理论物理室
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GB/T 7714
Zuo, F,Jia Y,Huang T,et al. gamma*rho(0) -> pi(0) transition form factor in extended AdS/QCD models[J]. EUROPEAN PHYSICAL JOURNAL C,2010,67(1-2):#REF!.
APA Zuo, F,贾宇,黄涛,Jia, Y,&Huang, T.(2010).gamma*rho(0) -> pi(0) transition form factor in extended AdS/QCD models.EUROPEAN PHYSICAL JOURNAL C,67(1-2),#REF!.
MLA Zuo, F,et al."gamma*rho(0) -> pi(0) transition form factor in extended AdS/QCD models".EUROPEAN PHYSICAL JOURNAL C 67.1-2(2010):#REF!.
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