Abstract
We present the open charm spectra at mid-rapidity from direct reconstruction of D0, D* and D± in d+Au collisions at using the STAR detector at RHIC. The indirect electron/positron measurements via charm semileptonic decays in p+p and d+Au collisions are also reported. The total cross section per nucleon–nucleon collision is extracted from both direct and indirect measurements and are consistent with each other. By combining the D0 and semileptonic measurements together, the cross section of 1.4 ± 0.2 ± 0.4 mb is higher than expectations from PYTHIA and other pQCD calculations. The open charm pT distribution from direct measurements covers the pT range up to ∼10 GeV/c and follows a power-law distribution.
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