Abstract
Exclusive incoherent electroproduction of the ρ0770 meson from 1H, 2H, 3He, and 14N targets has been studied by the HERMES experiment at squared four-momentum transfer Q2>0.4GeV2 and positron energy loss ν from 9 to 20 GeV. The ratio of the 14N to 1H cross sections per nucleon, known as the nuclear transparency, was found to decrease with increasing coherence length of quark-antiquark fluctuations of the virtual photon. The data provide clear evidence of the interaction of the quark-antiquark fluctuations with the nuclear medium.Received 5 November 1998DOI:https://doi.org/10.1103/PhysRevLett.82.3025©1999 American Physical Society
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