Charged hadron transverse momentum distributions in Au+Au collisions at sqrt(s_NN) = 200 GeV

Details Charged hadron transverse momentum distributions in Au+Au collisions at sqrt(s_NN) = 200 GeV Charged hadron transverse momentum distributions in Au+Au collisions at sqrt(s_NN) = 200 GeV

2003-02-13

arxiv.org/abs/nucl-ex/0302015v1

Phys.Lett.B578:297-303,2004

Physics

Nuclear Physics

Nuclear Experiment

5 pages, 4 figures, submitted to Phys.Lett.B

Scientific paper

10.1016/j.physletb.2003.10.101

We present transverse momentum distributions of charged hadrons produced in Au+Au collisions at sqrt(s_NN) = 200 GeV. The spectra were measured for transverse momenta p_T from 0.25 to 4.5 GeV/c in a rapidity range of 0.2 < y_pi < 1.4. The evolution of the spectra is studied as a function of collision centrality, from 65 to 344 participating nucleons. The results are compared to data from proton-antiproton collisions and Au+Au collisions at lower RHIC energies. We find a significant change of the spectral shape between proton-antiproton and peripheral Au+Au collisions. Comparing peripheral to central Au+Au collisions, we find that the yields at high p_T exhibit approximate scaling with the number of participating nucleons, rather than scaling with the number of binary collisions.

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