Numerical studies of the intrinsic charm model

Explicit calculations of the model five-quark wave-function, suggested by Brodsky and co-workers to describe uudc(c bar) Fock components in the proton, allow one to address quantitative questions such as the normalization relative to uuds(s bar) and uudb(b bar) components and the threshold behavior of structure functions for charm production. The results suggest that the intrinsic charm normalization should be less than 1%, that the b/c normalization ratio should be of order 0.2 and that threshold suppression in F2 turns off rather rapidly above threshold. (Copyright (c) 1982 Science and Engineering Research Council.)