Centrality and pseudorapidity dependence of charged hadron production at intermediate pTin Au+Au collisions at √sNN=130 GeV

STAR Collaboration

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Abstract

We present STAR measurements of charged hadron production as a function of centrality in Au+Au collisions at √sNN=130 GeV. The measurements cover a phase space region of 0.2<pT<6.0 GeV/c in transverse momentum and -1 < η< 1 in pseudorapidity. Inclusive transverse momentum distributions of charged hadrons in the pseudorapidity region 0.5<|η|<1 are reported and compared to our previously published results for |η|<0.5. No significant difference is seen for inclusive pT distributions of charged hadrons in these two pseudorapidity bins. We measured dN/dη distributions and truncated mean pT in a region of pT>pcut, and studied the results in the framework of participant and binary scaling. No clear evidence is observed for participant scaling of charged hadron yield in the measured pT region. The relative importance of hard scattering processes is investigated through binary scaling fraction of particle production.

Original languageEnglish
Article number044901
Pages (from-to)044901-1-044901-11
JournalPhysical Review C - Nuclear Physics
Volume70
Issue number4
DOIs
StatePublished - Oct 1 2004
Externally publishedYes

Funding

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; SFOM of the Czech Republic; FOM and UU of the Netherlands; DAE, DST, and CSIR of the Government of India; and the Swiss NSF.

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