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

Kroll, P. and Passek-Kumericki, K. (2013) The eta(eta') gamma transition form factor and the gluon-gluon distribution amplitude. JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 40 (7): 075005. ISSN 0954-3899, 1361-6471

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Abstract

The eta gamma and eta'gamma transition form factors are analyzed to leading-twist accuracy and next-to-leading order 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 q (q) over bar 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.

Item Type: Article
Uncontrolled Keywords: PSEUDOSCALAR MESONS; EXCLUSIVE PROCESSES; SYMMETRY-BREAKING; LEADING ORDER; FACTORIZATION; DECAYS; PHOTON; ANNIHILATION; QUARKONIUM; EVOLUTION;
Subjects: 500 Science > 530 Physics
Divisions: Physics > Institute of Theroretical Physics
Depositing User: Dr. Gernot Deinzer
Date Deposited: 07 Apr 2020 10:39
Last Modified: 07 Apr 2020 10:39
URI: https://pred.uni-regensburg.de/id/eprint/16478

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