  It is demonstrated that an emission of collinear photons by the polarized
initial electron in elastic electron-proton polarization transfer scattering
leads to an apparent shifting of real events with small momentum transfer into
the data sample with large momentum transfer. Effectively this shows a fictive
enhancement of the cross section at large momentum transfer. However, the
enhancement is different for transverse and longitudinal polarizations of the
recoil proton. The former is responsible for a deformation of results when
extracting the proton electromagnetic form factors ratio from the data on
electron-proton polarization transfer scattering. Nevertheless, this effect
does not explain the suppression of the Dirac form factor at large momentum
transfer completely.
