Observation of $D^0$ Meson Nuclear Modifications in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV - INSPIRE

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Observation of $D^0$ Meson Nuclear Modifications in Au+Au Collisions at $\sqrt{s_{NN}}=200$ GeV

STAR

Collaboration

Apr 24, 2014

7 pages

Published in:

Phys.Rev.Lett. 113 (2014) 14, 142301,
Phys.Rev.Lett. 121 (2018) 22, 229901 (erratum)

Published: Sep 30, 2014

e-Print:

1404.6185 [nucl-ex],
1809.08737 [nucl-ex]

DOI:

10.1103/PhysRevLett.113.142301,
10.1103/PhysRevLett.121.229901 (erratum)

Experiments:

BNL-RHIC-STAR

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Abstract: (APS)

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.

Note:

7 pages including author list, 4 figures, submit to PRL with revised version •
5 pages, 3 figures, erratum for Phys. Rev. Lett. 113,142301 (2014)

25.75.-q
heavy ion: scattering
gold
D0: hadroproduction
D0: hadronic decay
D0: yield
nuclear matter: effect
transverse momentum dependence
charm: energy loss
coalescence

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