Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2010-09-06
Phys.Lett.B695:130-135,2011
Physics
High Energy Physics
High Energy Physics - Phenomenology
12 pages, 3 figures, typos corrected, published in Phys. Lett. B
Scientific paper
10.1016/j.physletb.2010.10.039
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 data of BaBar Collaboration, that the relative correction to continuum is quite small, and small correction to continuum can dramatically change the pion form factor.
Klopot Yaroslav N.
Oganesian Armen G.
Teryaev Oleg V.
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