Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss in Au+Au Collisions at {radical}(s{sub NN})=200 GeV

S. S. Adler,C. Aidala,S. H. Aronson,T. Chujo,G. David,E. J. Desmond,L. Ewell,A. Franz,W. Guryn,J. S. Haggerty,M. Harvey,B. M. Johnson,E. Kistenev,P. J. Kroon,Y. I. Makdisi,S. Mioduszewski,J. T. Mitchell,D. P. Morrison,E. O’Brien,C. Pinkenburg

Nuclear Modification of Electron Spectra and Implications for Heavy Quark Energy Loss in Au+Au Collisions at {radical}(s{sub NN})=200 GeV

2006

The PHENIX experiment has measured midrapidity (vertical bar {eta} vertical bar <0.35) transverse momentum spectra (0.4eta} mesons, were removed. The resulting nonphotonic electron spectra are primarily due to the semileptonic decays of hadrons carrying heavy quarks. Nuclear modification factors were determined by comparison to nonphotonic electrons in p+p collisions. A significant suppression of electrons at high p{sub T} is observed in central Au+Au collisions, indicating substantial energy loss of heavy quarks.

Keywords:

Quark
Atomic physics
Centrality
Hadron
Semileptonic decay
Meson
Nuclear physics
Pi
Physics
Electron
Photon

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