Observation of D[superscript 0] Meson Nuclear Modifications in Au + Au Collisions at √s[subscript NN] = 200 GeV
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Adamczyk-2014-Observation of D0 Meson.pdf
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Author(s)
Stevens, Justin
van Nieuwenhuizen, Gerrit J
Date Issued
September 2014
Journal
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
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Final published version
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.113.142301
