Energy Loss and Flow of Heavy Quarks in Au+Au Collisions at sqrt(s_NN) = 200 GeV

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dc.creatorPHENIX Collaboration
dc.creatorAdare, A.
dc.date2006-11-11
dc.date2007-11-07
dc.date.accessioned2026-07-07T12:00:03Z
dc.date.available2026-07-07T12:00:03Z
dc.descriptionThe PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has measured electrons from heavy flavor (charm and bottom) decays for 0.3 < p_T < 9 GeV/c at midrapidity (|y| < 0.35) in Au+Au collisions at sqrt(s_NN) = 200 GeV. The nuclear modification factor R_AA relative to p+p collisions shows a strong suppression in central Au+Au collisions, indicating substantial energy loss of heavy quarks in the medium produced at RHIC. A large azimuthal anisotropy, v_2, with respect to the reaction plane is observed for 0.5 < p_T < 5 GeV/c indicating non-zero heavy flavor elliptic flow. Both R_AA and v_2 show a p_T dependence different from those of neutral pions. A comparison to transport models which simultaneously describe R_AA(p_T) and v_2(p_T) suggests that the viscosity to entropy density ratio is close to the conjectured quantum lower bound, i.e., near a perfect fluid.
dc.descriptionv2 replaced Fig. 3 to fix an error in using a wrong theory curve; v3 minor changes in review process, including last 2 sentences of abstract. 422 authors, 58 institutions, 6 pages text, 3 figures, REVTeX4. Submitted to Physical Review Letters. Plain text data tables for the points plotted in figures available at http://www.phenix.bnl.gov/papers.html
dc.identifierhttps://arxiv.org/abs/nucl-ex/0611018
dc.identifierhttp://arxiv.org/abs/nucl-ex/0611018
dc.identifierPhys.Rev.Lett.98:172301,2007
dc.identifierdoi:10.1103/PhysRevLett.98.172301
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206768
dc.subjectNuclear Experiment
dc.titleEnergy Loss and Flow of Heavy Quarks in Au+Au Collisions at sqrt(s_NN) = 200 GeV
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