Electromagnetic Transition Form Factor of Pseudoscalar Meson and $\eta-\eta'$ Mixing

Jun Cao; Fu-Guang Cao; Tao Huang; Bo-Qiang Ma

doi:10.1103/PhysRevD.58.113006

Electromagnetic Transition Form Factor of Pseudoscalar Meson and $\eta-\eta'$ Mixing

High Energy Physics - Phenomenology 2009-10-31 v1

Authors: Jun Cao , Fu-Guang Cao , Tao Huang , Bo-Qiang Ma

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Abstract

The electromagnetic transition form factors of $\eta$ and $\eta'$ are calculated in the light-cone perturbation theory. We show that it is unreliable to determine the \eta-\etap' $mixing angle without any additional normalization conditions other than their decay widthes to two photons. The possible intrinsic$ c\bar{c} $component in the flavor singlet is investigated. The heavy quark pair has distinct properties from the light ones in electromagnetic transition processes of pseudoscalar mesons. It is possible to explore the size of$ c\bar{c} $component and our numerical results disfavor a large portion of$ c\bar{c}$ component.

Keywords

electromagnetic transition form factor pseudoscalar meson eta-eta' mixing light-cone perturbation theory intrinsic charm

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@article{arxiv.hep-ph/9807508,
  title  = {Electromagnetic Transition Form Factor of Pseudoscalar Meson and $\eta-\eta'$ Mixing},
  author = {Jun Cao and Fu-Guang Cao and Tao Huang and Bo-Qiang Ma},
  journal= {arXiv preprint arXiv:hep-ph/9807508},
  year   = {2009}
}

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13 pages, RevTeX, 4 ps figures, to appear in Phys. Rev. D

Electromagnetic Transition Form Factor of Pseudoscalar Meson and $\eta-\eta'$ Mixing

Abstract

Keywords

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