Elsevier, Physics Letters B, 3(278), p. 385-392, 1992
DOI: 10.1016/0370-2693(92)90212-m
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Kinematic correlations between the charmed D and mesons produced by a photon beam of mean energy have been measured by the NA experiment at CERN using a sample of almost background-free fully reconstructed D events. The observed D and D distributions are compared to the predictions of production models using different parameters for the charm fragmentation function and for the intrinsic transverse momentum of the partons.