Measurements of transverse energy distributions in Au+Au collisions at √sNN=200 GeV 054907

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Transverse energy (ET) distributions have been measured for Au+Au collisions at √sNN=200 GeV by the STAR Collaboration at RHIC. ET is constructed from its hadronic and electromagnetic components, which have been measured separately. ET production for the most central collisions is well described by several theoretical models whose common feature is large energy density achieved early in the fireball evolution. The magnitude and centrality dependence of ET per charged particle agrees well with measurements at lower collision energy, indicating that the growth in ETfor larger collision energy results from the growth in particle production. The electromagnetic fraction of the total ET is consistent with a final state dominated by mesons and independent of centrality.

Original languageEnglish
Article number054907
Pages (from-to)054907-1-054907-14
JournalPhysical Review C - Nuclear Physics
Issue number5
StatePublished - Nov 1 2004

Bibliographical note

Funding Information:
We thank the RHIC Operations Group and RCF at BNL, and the NERSC Center at LBNL for their support. This work was supported in part by the HENP Divisions of the Office of Science of the U.S. DOE; the U.S. NSF; the BMBF of Germany; IN2P3, RA, RPL, and EMN of France; EPSRC of the United Kingdom; FAPESP of Brazil; the Russian Ministry of Science and Technology; the Ministry of Education and the NNSFC of China; Grant Agency of the Czech Republic, FOM and UU of the Netherlands, DAE, DST, and CSIR of the Government of India; Swiss NSF; and the Polish State Committee for Scientific Research.

Publisher Copyright:
© 2004 The American Physical Society.

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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