Open Charm Yields in d+Au Collisions at sNN=200   GeV

J. Adams et al. (STAR Collaboration)
Phys. Rev. Lett. 94, 062301 – Published 17 February 2005

Abstract

Midrapidity open charm spectra from direct reconstruction of D0(D0¯)Kπ± in d+Au collisions and indirect electron-positron measurements via charm semileptonic decays in p+p and d+Au collisions at sNN=200GeV are reported. The D0(D0¯) spectrum covers a transverse momentum (pT) range of 0.1<pT<3GeV/c, whereas the electron spectra cover a range of 1<pT<4GeV/c. The electron spectra show approximate binary collision scaling between p+p and d+Au collisions. From these two independent analyses, the differential cross section per nucleon-nucleon binary interaction at midrapidity for open charm production from d+Au collisions at BNL RHIC is dσcc¯NN/dy=0.30±0.04(stat)±0.09(syst)   mb. The results are compared to theoretical calculations. Implications for charmonium results in A+A collisions are discussed.

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  • Received 6 July 2004

DOI:https://doi.org/10.1103/PhysRevLett.94.062301

©2005 American Physical Society

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Vol. 94, Iss. 6 — 18 February 2005

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