Suppressed π0 Production at Large Transverse Momentum in Central Au+Au Collisions at sNN=200GeV

S. S. Adler et al. (PHENIX Collaboration)
Phys. Rev. Lett. 91, 072301 – Published 13 August 2003

Abstract

Transverse momentum spectra of neutral pions in the range 1<pT<10GeV/c have been measured at midrapidity by the PHENIX experiment at BNL RHIC in Au+Au collisions at sNN=200GeV. The π0 multiplicity in central reactions is significantly below the yields measured at the same sNN in peripheral Au+Au and p+p reactions scaled by the number of nucleon-nucleon collisions. For the most central bin, the suppression factor is 2.5 at pT=2GeV/c and increases to 45 at pT4GeV/c. At larger pT, the suppression remains constant within errors. The deficit is already apparent in semiperipheral reactions and increases smoothly with centrality.

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  • Received 28 April 2003

DOI:https://doi.org/10.1103/PhysRevLett.91.072301

©2003 American Physical Society

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Vol. 91, Iss. 7 — 15 August 2003

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