Journal
PHYSICS LETTERS B
Volume 695, Issue 1-4, Pages 130-135Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2010.10.039
Keywords
Axial anomaly; Transition form factors of mesons
Funding
- RFBR [09-02-00732, 09-02-01149]
- EC [R113-CT-2004-506078]
- CRDF [RUP2-2961-MO-09]
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We study the transition form factors of the light mesons in the kinematics, where one photon is real and other is virtual. Using the dispersive approach to axial anomaly we show that the axial anomaly in this case reveals itself as a collective effect of meson spectrum. This allows us to get the relation between possible corrections to continuum and to lower states within QCD method which does not rely on factorization hypothesis. We show, relying on the recent experimental data, that the relative correction to continuum is quite small, and small correction to continuum can dramatically change the pion form factor. (C) 2010 Elsevier B.V. All rights reserved.
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