Energy Lossand Flow of Heavy Quarks in Au+Au Collisions at root-s=200GeV

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The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has measured electrons with 0.3 < p{sub rmT} < 9 GeV/c at midrapidity (|y| < 0.35) from heavy flavor (charm and bottom) decays in Au+Au collisions at {radical}s{sub NN} = 200 GeV. The nuclear modification factor R{sub 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 energies. A large azimuthal anisotropy, v{sub 2}, with respect to the reaction plane is observed for 0.5 < p{sub rmT} < 5 GeV/c indicating non-zero heavy flavor ... continued below

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8 p. (0.2 MB)

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Soltz, R; Klay, J; Enokizono, A; Newby, J; Heffner, M & Hartouni, E February 26, 2007.

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The PHENIX experiment at the Relativistic Heavy Ion Collider (RHIC) has measured electrons with 0.3 < p{sub rmT} < 9 GeV/c at midrapidity (|y| < 0.35) from heavy flavor (charm and bottom) decays in Au+Au collisions at {radical}s{sub NN} = 200 GeV. The nuclear modification factor R{sub 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 energies. A large azimuthal anisotropy, v{sub 2}, with respect to the reaction plane is observed for 0.5 < p{sub rmT} < 5 GeV/c indicating non-zero heavy flavor elliptic flow. A simultaneous description of R{sub AA}(p{sub rmT}) and v{sub 2}(p{sub rmT}) constrains the existing models of heavy-quark rescattering in strongly interacting matter and provides information on the transport properties of the produced medium. In particular, a viscosity to entropy density ratio close to the conjectured quantum lower bound, i.e. near a perfect fluid, is suggested.

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8 p. (0.2 MB)

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PDF-file: 8 pages; size: 0.2 Mbytes

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  • Journal Name: Energy Loss and Flow of Heavy Quarks in Au+Au Collisions at root-s=200 GeV, vol. 98, no. 17, April 21, 2007, pp. 172301; Journal Volume: 98; Journal Issue: 17

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  • Report No.: UCRL-JRNL-228385
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 940470
  • Archival Resource Key: ark:/67531/metadc901154

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • February 26, 2007

Added to The UNT Digital Library

  • Sept. 27, 2016, 1:39 a.m.

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  • April 17, 2017, 2:05 p.m.

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Soltz, R; Klay, J; Enokizono, A; Newby, J; Heffner, M & Hartouni, E. Energy Lossand Flow of Heavy Quarks in Au+Au Collisions at root-s=200GeV, article, February 26, 2007; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc901154/: accessed October 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.