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
Full text not available from this repository. (Request a copy)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 |
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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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