Agaev, S. S. and Braun, V. M. and Offen, N. and Porkert, F. A. and Schaefer, A. (2014) Transition form factors gamma*gamma -> eta and gamma*gamma -> eta ' in QCD. PHYSICAL REVIEW D, 90 (7): 074019. ISSN 2470-0010, 2470-0029
Full text not available from this repository.Abstract
We update the theoretical framework for the QCD calculation of transition form factors gamma*gamma -> eta and gamma*gamma -> eta ' at large photon virtualities including full next-to-leading order analysis of perturbative corrections, the charm quark contribution, and taking into account SU(3)-flavor breaking effects and the axial anomaly contributions to the power-suppressed twist-four distribution amplitudes. The numerical analysis of the existing experimental data is performed with these improvements.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | TO-LEADING-ORDER; PION DISTRIBUTION AMPLITUDE; CHIRAL PERTURBATION-THEORY; QUANTUM CHROMODYNAMICS; SUM-RULES; ASYMPTOTIC-BEHAVIOR; EXCLUSIVE PROCESSES; PSEUDOSCALAR MESONS; EVOLUTION-EQUATIONS; RESONANCE PHYSICS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Braun > Group Vladimir Braun Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Aug 2019 13:22 |
| Last Modified: | 08 Aug 2019 13:22 |
| URI: | https://pred.uni-regensburg.de/id/eprint/9351 |
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