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Open charm measurements at STAR

  • Regular Article – Experimental Physics
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Abstract

We report on the measurements of D0 meson production via direct reconstruction through the hadronic decay channel D0→Kπ in minimum bias d+Au and Au+Au collisions at \(\sqrt{s_{NN}}=200\mathrm{GeV}\) with pT up to ∼3 GeV/c. We derive the charm production total cross-section per nucleon–nucleon collision from a combination of three measurements: the D0 meson spectra, the non-photonic electron spectra from charm semi-leptonic decays obtained in p+p, d+Au, and Au+Au collisions, and the charm-decayed single muon (prompt muon) spectra at low pT in Au+Au collisions. The cross-section is found to follow binary scaling, which is a signature of charm production exclusively at the initial impact. The implications of charm quark energy-loss and thermalization in the strongly interacting matter are discussed.

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Authors and Affiliations

  1. Brookhaven National Laboratory, Upton, NY, 11973, USA

    Haibin Zhang

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  1. Haibin Zhang
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Correspondence to Haibin Zhang.

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PACS

25.75.Dw; 13.20.Fc; 13.25.Ft; 24.85.+p

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Zhang, H. Open charm measurements at STAR. Eur. Phys. J. C 49, 355–358 (2007). https://doi.org/10.1140/epjc/s10052-006-0092-7

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  • DOI: https://doi.org/10.1140/epjc/s10052-006-0092-7

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