Color-conductivity in nuclei and the EMC-effect

We advocate that gluons and quarks of sufficiently short wavelengths are delocalized in nuclei. This hypothesis leads us to structure functions measured in μ-nucleus scattering, which depend at fixed x only on the ratio of the resolving power 1/Q and the radius of the nucleus Rsub(A), where A denotes the mass number of the nucleus. Thus we suggest that the structure function F2(x, Q2, A) per nucleon of an isoscalar nucleus A scales essentially as F2(x, Q2, A)=anti F2(x, Rsub(A)2, Q2) with a universal function anti F2. The ratio of the so obtained structure functions of iron to deuterium agrees rather well with the one measured recently by the European Muon Collaboration. This observation implies that nuclei are ''color-insulators'' at low Q2, but ''color conductors'' at large Q2. (orig.)