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题名: Large corrections to asymptotic F-eta c gamma and F-eta b gamma in the light-cone perturbative QCD
作者: Cao, FG ;  Huang, T
刊名: PHYSICAL REVIEW D
出版日期: 1999
卷号: 59, 期号:9, 页码:-
关键词: TRANSITION FORM-FACTOR ;  INFINITE-MOMENTUM FRAME ;  QUANTUM ELECTRODYNAMICS ;  WIGNER ROTATION ;  WAVE-FUNCTION ;  PION ;  DECAYS ;  SPIN ;  GAMMA-GAMMA-ASTERISK->PI(0) ;  CONSTANT
学科分类: Physics
通讯作者: Cao, FG , Massey Univ, Inst Fundamental Sci, Private Bag 11 222, Palmerston North, New Zealand.
部门归属: Massey Univ, Inst Fundamental Sci, Palmerston North, New Zealand; CCAST, World Lab, Beijing 100080, Peoples R China; Acad Sinica, Inst High Energy Phys, Beijing 100039, Peoples R China; Acad Sinica, Inst Theoret Phys, Beijing 100080, Peoples R China
英文摘要: The large-Q(2) behavior of eta(c)-gamma and eta(b)-gamma transition form factors F-eta c gamma(Q(2)) and F-eta b gamma(Q(2)) is analyzed in the framework of light-cone perturbative QCD with heavy quark (c and b) mass effects, parton transverse momentum dependence, and higher helicity components in the light-cone wave function are respected. It is pointed out that the quark mass effect brings significant modifications to the asymptotic predictions of the transition form factors in a rather broad energy region, and the modification for F-eta b gamma(Q(2)) is much more severe than that for F-eta c gamma(Q(2)) due to the b quark being heavier than the c quark. The parton transverse momentum and the higher helicity components also play a role in reducing the perturbative predictions. For the transition form factor F-eta c gamma(Q(2)), they bring sizable corrections in the present experimentally accessible energy region (Q(2) less than or equal to 10 GeV2). For the transition form factor F-eta b gamma(Q(2)), the corrections coming from these two factors are negligible since the b-quark mass is much larger than the parton's average transverse momentum. The coming e(+)e(-) collider (CERN LEP2) will provide the opportunity to examine these theoretical predictions. [S0556-2821(99)00909-1].
收录类别: SCI
WOS记录号: WOS:000080114600015
Citation statistics: 
内容类型: 期刊论文
URI标识: http://ir.itp.ac.cn/handle/311006/13160
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:
Cao, FG,Huang, T. Large corrections to asymptotic F-eta c gamma and F-eta b gamma in the light-cone perturbative QCD[J]. PHYSICAL REVIEW D,1999,59(9):-.
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