Has the QCD renormalization-group-improved parton content of virtual photons been observed?
Has the QCD renormalization-group-improved parton content of virtual photons been observed?
It is demonstrated that present $e^+e^-$ and DIS ep data on the structure of the virtual photon can be understood entirely in terms of the standard `naive' quark--parton model box approach. Thus the QCD renormalization group (RG) improved parton distributions of virtual photons, in particular their gluonic component, have not …