Observation of D[superscript 0] Meson Nuclear Modifications in Au + Au Collisions at √s[subscript NN] = 200 GeV
Author(s)
Stevens, Justin; van Nieuwenhuizen, Gerrit J
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We report the first measurement of charmed-hadron (D[superscript 0]) production via the hadronic decay channel (D[superscript 0] → K[superscript −] + π[superscript +]) in Au + Au collisions at √s[subscript NN] =200 GeV with the STAR experiment. The charm production cross section per nucleon-nucleon collision at midrapidity scales with the number of binary collisions, N[subscript bin], from p + p to central Au + Au collisions. The D[superscript 0] meson yields in central Au + Au collisions are strongly suppressed compared to those in p + p scaled by N[subscript bin], for transverse momenta p[subscript T] > 3 GeV/c, demonstrating significant energy loss of charm quarks in the hot and dense medium. An enhancement at intermediate p[subscript T] is also observed. Model calculations including strong charm-medium interactions and coalescence hadronization describe our measurements.
Date issued
2014-09Department
Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Adamczyk, L., J. K. Adkins, G. Agakishiev, M. M. Aggarwal, Z. Ahammed, I. Alekseev, J. Alford, et al. “Observation of D[superscript 0] Meson Nuclear Modifications in Au + Au Collisions at √s[subscript NN] = 200 GeV.” Physical Review Letters 113, no. 14 (September 2014). © 2014 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114