Observation of D0 Meson Nuclear Modifications in Au+Au Collisions at √sNN = 200 GeV (CROSBI ID 210369)
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Podaci o odgovornosti
Adamczyk, L. ; ... ; Planinić, Mirko ; ... ; Poljak, Nikola ; ... ; Zyzak, M.
engleski
Observation of D0 Meson Nuclear Modifications in Au+Au Collisions at √sNN = 200 GeV
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.
meson; modification; STAR
STAR Collaboration.
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Podaci o izdanju
113
2014.
142301-1-142301-7
objavljeno
0031-9007
10.1103/PhysRevLett.113.142301