Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
1998-11-06
Phys.Rev.Lett.82:3025-3029,1999
Physics
High Energy Physics
High Energy Physics - Experiment
RevTeX, 5 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.82.3025
Exclusive incoherent electroproduction of the rho^0(770) meson from 1H, 2H, 3He, and 14N targets has been studied by the HERMES experiment at squared four-momentum transfer Q**2>0.4 GeV**2 and positron energy loss nu 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.
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