The Role of the Coherence Length in Exclusive Electroproduction of Vector Mesons off Nuclei

J. Huefner, B. Kopeliovich, J. Nemchik

The variation of the coherence length $l_c=2\nu /(Q^2+m_V^2)$ in virtual photoproduction of vector mesons off nuclei as a function of the photon energy $\nu$ or virtuality $Q^2$ results…