Model-independent study of light-cone current commutators

An attempt is made to extract information on the nature of light-cone current commutators (LCC) in a model-independent manner. Using simple assumptions on the validity of the Deser--Gilbert--Sudarshan (DGS) representation for the structure functions of deep-inelastic scattering and using the Bjorken--Johnson--Low theorem, we show that in principle the LCC may be constructed if one knows the experimental electron--proton scattering data. On the other hand, the scaling behavior of the structure functions is utilized to study the consistency of a vanishing value for various LCC under mild assumptions on the behavior of the DGS spectral moments