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- Title
Pion-Distribution Amplitude within the Instanton Model.
- Authors
Anikin, I. V.; Dorokhov, A. E.; Tomio, L.
- Abstract
The leading-twist pion-distribution amplitude is obtained at a low normalization scale of order ρ[sub c] (inverse average size of an instanton). Pion dynamics, consistent with gauge invariance and low-energy theorems, is considered within the instanton vacuum model. The results are QCD-evolved to higher momentum-transfer values and are in agreement with recent data from CLEO on the pion transition form factor. It is also shown that some previous calculations violate the axial Ward-Takahashi identity.
- Subjects
PIONS; INSTANTONS
- Publication
Physics of Atomic Nuclei, 2001, Vol 64, Issue 7, p1329
- ISSN
1063-7788
- Publication type
Article
- DOI
10.1134/1.1389562