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题名: gamma*rho(0) -> pi(0) transition form factor in extended AdS/QCD models
作者: Zuo, Fen ;  Jia, Yu ;  Huang, Tao
刊名: EUROPEAN PHYSICAL JOURNAL C
出版日期: 2010
卷号: 67, 期号:40910, 页码:253-261
关键词: QCD SUM-RULES ;  HOLOGRAPHIC QCD ;  WAVE-FUNCTIONS ;  VECTOR-MESONS ;  PHYSICS ;  DECAY
学科分类: Physics
通讯作者: Zuo, F , Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China
部门归属: [Zuo, F] Chinese Acad Sci, Inst Theoret Phys, Key Lab Frontiers Theoret Phys, Beijing 100190, Peoples R China; [Jia, Y; Huang, T] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China; [Jia, Y; Huang, T] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China
英文摘要: 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.
资助者: Natural Science Foundation of China[10875130, 10935012, 10805082, 10675132]
收录类别: SCI
原文出处: 查看原文
WOS记录号: WOS:000277300300021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/5117
Appears in Collections:理论物理所1978-2010年知识产出_期刊论文

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Recommended Citation:
Zuo, Fen,Jia, Yu,Huang, Tao. gamma*rho(0) -> pi(0) transition form factor in extended AdS/QCD models[J]. EUROPEAN PHYSICAL JOURNAL C,2010,67(40910):253-261.
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