Abstract
In a recent publication we calculated elastic charmonium production in collisions, employing realistic charmonia wave functions and dipole cross sections, and found good agreement with the data in a wide range of s and . Using the ingredients from those calculations we calculate exclusive electroproduction of charmonia off nuclei. Here new effects become important, (i) color filtering of the pair on its trajectory through nuclear matter, (ii) dependence on the finite lifetime of the fluctuation (coherence length), and (iii) gluon shadowing in a nucleus compared to the one in a nucleon. Total coherent and incoherent cross sections for C, Cu, and Pb as functions of s and are presented together with some differential cross sections. The results can be tested with future electron-nucleus colliders or in peripheral collisions of ultrarelativistic heavy ions.
- Received 9 March 2002
DOI:https://doi.org/10.1103/PhysRevC.66.024903
©2002 American Physical Society