Aling of electromagnetic form factors and the behavior of their Fourier transforms in the neighborhood of the light cone

The concept of a quasiasymptotic behavior of a generalized function at infinity is introduced. A sufficient condition for scaling is given in terms of the quasiasymptotic properties of the spectral function in the Jost–Lehmann–Dyson representation. A one-to-one correspondence between these properties and the behavior of the Fourier transforms of the form factors in the neighborhood of the light cone is established.