The photon to pseudoscalar meson transition form factors

In this talk it is reported on an analysis [P. Kroll, Eur. Phys. J. C71, 1623 (2011)] of the form factors for the transitions from a photon to one of the pseudoscalar mesons π0, η, η′, ηc within the modified perturbative approach in which quark transverse degrees of freedom are retained. The report is focused on the discussion of the surprising features the new BaBar data exhibit, namely the sharp rise of the πγ form factor with the photon virtuality and the strong breaking of flavor symmetry in the sector of pseudoscalar mesons.