Agaev, S. S. (2005) Impact of the higher twist effects on the gamma gamma(*) -> pi(0) transition form factor. PHYSICAL REVIEW D, 72 (11): 114010. ISSN 2470-0010, 2470-0029
Full text not available from this repository. (Request a copy)Abstract
We reanalyze the gamma gamma(*)->pi(0) transition form factor F-pi gamma(Q(2)) within the QCD light-cone sum rules method with the twist-4 accuracy. In computations, the pion leading twist distribution amplitude (DA) with two nonasymptotic terms and the renormalon method-inspired twist-4 DAs are used. The latters allow us to estimate the impact of effects due to higher conformal spin components in the pion twist-4 DAs on the form factor F-pi gamma(Q(2)). Obtained theoretical predictions are employed to deduce constraints on the pion DAs from CELLO and CLEO data.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | QCD SUM-RULES; PION WAVE-FUNCTION; DISTRIBUTION AMPLITUDES; QUANTUM CHROMODYNAMICS; ASYMPTOTIC-BEHAVIOR; EXCLUSIVE PROCESSES; EVOLUTION-EQUATIONS; RESONANCE PHYSICS; VECTOR-MESONS; DISTRIBUTIONS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 23 Apr 2021 04:40 |
| Last Modified: | 23 Apr 2021 04:40 |
| URI: | https://pred.uni-regensburg.de/id/eprint/35393 |
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