The eta (eta') gamma transition form factor and the gluon-gluon distribution amplitude

Abstract

The eta-gamma and eta'-gamma transition form factors are analyzed to leading-twist accuracy and next-to-leading order (NLO) of perturbative QCD. Using an eta-eta' mixing scheme and all currently available experimental data the lowest Gegenbauer coefficients of the distribution amplitudes for the valence octet and singlet quark-antiquark and the gluon-gluon Fock components are extracted. Predictions for the g*g*eta' vertex function are presented. We also comment on the new BELLE results for the pi-gamma transition form factor.

28 pages, 13 figures, the paper is shortened, the references are updated and the title changed

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Cited by in corpus (22)

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• The eta transition form factor from space- and time-like experimental data
• Central exclusive production within the Durham model: a review
• Light-Cone Sum Rules for the $D_{(s)}\to {\eta }^{(\prime )}l{\nu }_l$ Form Factor
• Spacelike and timelike form factors for the $({\pi }^0,\eta ,{\eta }^{\prime })\to {\gamma }^{\ast }\gamma$ transitions in the light-front quark model
• Next-to-leading order corrections to deeply virtual production of pseudoscalar mesons
• Hard exclusive two photon processes in QCD
• Exclusive Radiative Z-Boson Decays to Mesons with Flavor-Singlet Components
• Eta-nucleon and eta-prime-nucleon coupling constants in QCD and the role of gluons
• Probing the perturbative dynamics of exclusive meson pair production
• $\eta$-$\gamma$ and ${\eta }^{\prime }$-$\gamma$ transition form factors in a nonlocal NJL model
• Two-gluon production of $\varphi$ and ${\eta }^{\prime }$ mesons in proton-proton collisions at high energies
• On some implications of the BaBar data on the ${\gamma }^{\ast }{\eta }^{\prime }$ transition form factor
• ${\chi }_c$ decays and the gluon content of the ${\eta }^{\prime }$, $\eta$ mesons
• Light-Front Quark Model Analysis of Meson-Photon Transition Form Factor
• Form factors for semileptonic $B_c$ decays into ${\eta }^{{(}^{\prime })}$ and Glueball
• Gravitational form factors in the perturbative limit
• Exclusive meson pair production and the gluonic component of the eta, eta' mesons
• Sub-leading power corrections to transition form factors of $\eta$ and ${\eta }^{\prime }$ mesons from twist-six contributions