Measurements of D0 and D* production in p+p collisions at s=200GeV

L. Adamczyk et al. (STAR Collaboration)
Phys. Rev. D 86, 072013 – Published 31 October 2012

Abstract

We report measurements of charmed-hadron (D0,D*) production cross sections at midrapidity in p+p collisions at a center-of-mass energy of 200 GeV by the STAR experiment. Charmed hadrons were reconstructed via the hadronic decays D0Kπ+, D*+D0π+Kπ+π+ and their charge conjugates, covering the pT range of 0.62.0 and 2.06.0GeV/c for D0 and D*+, respectively. From this analysis, the charm-pair production cross section at midrapidity is dσ/dy|y=0cc¯=170±45(stat)59+38(sys)μb. The extracted charm-pair cross section is compared to perturbative QCD calculations. The transverse momentum differential cross section is found to be consistent with the upper bound of a fixed-order next-to-leading logarithm calculation.

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  • Received 19 April 2012

DOI:https://doi.org/10.1103/PhysRevD.86.072013

© 2012 American Physical Society

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Vol. 86, Iss. 7 — 1 October 2012

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