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From a sample of 20 072 dimuon final states, a first determination of the structure function F₂(cc̄) for diffractive charmed-quark pair production by 209-GeV muons is obtained. F₂(cc̄) has a ν dependence similar to that of the photon-gluon fusion model, but its Q² dependence peaks at lower Q². Diffractive charm production accounts for ~1/3 of the scale noninvariance observed in muon-nucleon scattering at low values of the Bjorken x variable, xB.
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Clark et al. (1980) studied this question.
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