Axial anomaly and mixing: from real to highly virtual photons
High Energy Physics - Phenomenology
2011-10-03 v2
Abstract
The relation for transition form factors of eta and eta' mesons is obtained by combining the exact nonperturbative QCD sum rule, following from the dispersive representation of axial anomaly, and quark-hadron duality. It is valid at all virtual photon momenta and allows one to express the transition form factors entirely in terms of meson decay constants. This relation is in a good agreement with experimental data.
Keywords
Cite
@article{arxiv.1106.3855,
title = {Axial anomaly and mixing: from real to highly virtual photons},
author = {Yaroslav N. Klopot and Armen G. Oganesian and Oleg V. Teryaev},
journal= {arXiv preprint arXiv:1106.3855},
year = {2011}
}
Comments
10 pages, 4 figures. Minor corrections, references added and updated; to appear in Phys.Rev.D