Abstract
Using the light-cone QCD dipole formalism we investigate manifestations of color transparency (CT) and coherence length (CL) effects in electroproduction of longitudinally () and transversally () polarized vector mesons. Motivated by forthcoming data from the HERMES experiment we predict both the and dependence of the ratios for mesons produced coherently and incoherently off nuclei. For an incoherent reaction the CT and CL effects add up and result in a monotonic dependence of the ratio at different values of . In contrast, for a coherent process the contraction of the CL with causes an effect opposite to that of CT and we expect quite a nontrivial dependence.
7 More- Received 13 March 2007
DOI:https://doi.org/10.1103/PhysRevC.76.025210
©2007 American Physical Society