Observation of D0 Meson Nuclear Modifications in Au+Au Collisions at √sNN=200  GeV

Adamczyk, L. and Planinić, Mirko and Poljak, Nikola and Zyzak, M. (STAR Collaboration) (2014) Observation of D0 Meson Nuclear Modifications in Au+Au Collisions at √sNN=200  GeV. Physical Review Letters, 113 (14). pp. 142301-7. ISSN 0031-9007

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We report the first measurement of charmed-hadron (D0) production via the hadronic decay channel (D0→K−+π+) in Au+Au collisions at √sNN=200  GeV with the STAR experiment. The charm production cross section per nucleon-nucleon collision at midrapidity scales with the number of binary collisions, Nbin, from p+p to central Au+Au collisions. The D0 meson yields in central Au+Au collisions are strongly suppressed compared to those in p+p scaled by Nbin, for transverse momenta pT>3  GeV/c, demonstrating significant energy loss of charm quarks in the hot and dense medium. An enhancement at intermediate pT is also observed. Model calculations including strong charm-medium interactions and coalescence hadronization describe our measurements.

Item Type: Article
Date: September 2014
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2014) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 02 Feb 2015 12:38
Last Modified: 02 Feb 2015 12:38
URI: http://digre.pmf.unizg.hr/id/eprint/3642

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