Hard-scattering approach to strongly hindered magnetic-dipole transitions in quarkonium
Jia Y(贾宇); Xu J(许甲); Zhang J(张娟); Jia, Y; Xu, J; Zhang, JA
刊名PHYSICAL REVIEW D
2010
卷号82期号:1页码:14008
学科分类Astronomy & Astrophysics; Physics
DOI10.1103/PhysRevD.82.014008
通讯作者[Jia, Yu ; Xu, Jia ; Zhang, Juan] Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China ; [Jia, Yu] Chinese Acad Sci, Theoret Phys Ctr Sci Facil, Beijing 100049, Peoples R China ; [Zhang, Juan] Shanxi Univ, Inst Theoret Phys, Taiyuan 030006, Shanxi, Peoples R China
文章类型Article
英文摘要For a class of hindered magnetic-dipole (M1) transition processes, such as Gamma(3S) -> eta(b) + gamma (the discovery channel of the eta(b) meson), the emitted photon is rather energetic so that the traditional approaches based on multipole expansion may be invalidated. We propose that a "hard-scattering'' picture, somewhat analogous to the pion electromagnetic form factor at large momentum transfer, may be more plausible to describe such types of transition processes. We work out a simple factorization formula at lowest order in the strong coupling constant, which involves convolution of the Schrodinger wave functions of quarkonia with a perturbatively calculable part induced by exchange of one semihard gluon between quark and antiquark. This formula, without any freely adjustable parameters, is found to agree with the measured rate of Gamma(3S) -> eta(b) + gamma rather well, and can also reasonably account for other recently measured hindered M1 transition rates. The branching fractions of Gamma(4S) -> eta((i))(b) + gamma are also predicted.
类目[WOS]Astronomy & Astrophysics ; Physics, Particles & Fields
研究领域[WOS]Astronomy & Astrophysics ; Physics
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语种英语
WOS记录号WOS:000280067500002
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被引频次:2[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/311005/240421
专题中国科学院高能物理研究所_理论物理室_期刊论文
中国科学院高能物理研究所_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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Jia Y,Xu J,Zhang J,et al. Hard-scattering approach to strongly hindered magnetic-dipole transitions in quarkonium[J]. PHYSICAL REVIEW D,2010,82(1):14008.
APA 贾宇,许甲,张娟,Jia, Y,Xu, J,&Zhang, JA.(2010).Hard-scattering approach to strongly hindered magnetic-dipole transitions in quarkonium.PHYSICAL REVIEW D,82(1),14008.
MLA 贾宇,et al."Hard-scattering approach to strongly hindered magnetic-dipole transitions in quarkonium".PHYSICAL REVIEW D 82.1(2010):14008.
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