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Large corrections to asymptotic F-eta c gamma and F-eta b gamma in the light-cone perturbative QCD
Cao, FG; Huang, T; Cao, FG , Massey Univ, Inst Fundamental Sci, Private Bag 11 222, Palmerston North, New Zealand.
1999
发表期刊PHYSICAL REVIEW D
ISSN0556-2821
卷号59期号:9页码:-
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].
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
关键词Transition Form-factor Infinite-momentum Frame Quantum Electrodynamics Wigner Rotation Wave-function Pion Decays Spin Gamma-gamma-asterisk->pi(0) Constant
学科领域Physics
收录类别SCI
WOS记录号WOS:000080114600015
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文献类型期刊论文
条目标识符http://ir.itp.ac.cn/handle/311006/13160
专题理论物理所1978-2010年知识产出
通讯作者Cao, FG , Massey Univ, Inst Fundamental Sci, Private Bag 11 222, Palmerston North, New Zealand.
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Cao, FG,Huang, T,Cao, FG , Massey Univ, Inst Fundamental Sci, Private Bag 11 222, Palmerston North, New Zealand.. 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):-.
APA Cao, FG,Huang, T,&Cao, FG , Massey Univ, Inst Fundamental Sci, Private Bag 11 222, Palmerston North, New Zealand..(1999).Large corrections to asymptotic F-eta c gamma and F-eta b gamma in the light-cone perturbative QCD.PHYSICAL REVIEW D,59(9),-.
MLA Cao, FG,et al."Large corrections to asymptotic F-eta c gamma and F-eta b gamma in the light-cone perturbative QCD".PHYSICAL REVIEW D 59.9(1999):-.
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