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Measurement of D0 Azimuthal Anisotropy at Midrapidity in Au+Au Collisions at sNN =200 GeV

Adamczyk, L.
•
Adkins, J. K.
•
Agakishiev, G.
altro
Zyzak, M.
2017
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We report the first measurement of the elliptic anisotropy (v2) of the charm meson D0 at midrapidity (|y|<1) in Au+Au collisions at sNN=200 GeV. The measurement was conducted by the STAR experiment at RHIC utilizing a new high-resolution silicon tracker. The measured D0 v2 in 0%–80% centrality Au+Au collisions can be described by a viscous hydrodynamic calculation for a transverse momentum (pT) of less than 4 GeV/c. The D0 v2 as a function of transverse kinetic energy (mT-m0, where mT=pT2+m02) is consistent with that of light mesons in 10%–40% centrality Au+Au collisions. These results suggest that charm quarks have achieved local thermal equilibrium with the medium created in such collisions. Several theoretical models, with the temperature-dependent, dimensionless charm spatial diffusion coefficient (2πTDs) in the range of ∼2–12, are able to simultaneously reproduce our D0 v2 result and our previously published results for the D0 nuclear modification factor.
DOI
10.1103/PhysRevLett.118.212301
WOS
WOS:000402057800005
Archivio
http://hdl.handle.net/11368/2941704
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85019658989
http://harvest.aps.org/bagit/articles/10.1103/PhysRevLett.118.212301/apsxml
Diritti
closed access
FVG url
https://arts.units.it/request-item?handle=11368/2941704
Soggetti
  • D meson

  • flow

  • charm

Web of Science© citazioni
83
Data di acquisizione
Mar 28, 2024
Visualizzazioni
1
Data di acquisizione
Apr 19, 2024
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