Eur. Phys. J. C (2007) 49: 29-34
https://doi.org/10.1140/epjc/s10052-006-0101-x

Regular Article – Experimental Physics

Identified charged hadron production at high p_T in  =200 GeV Au + Au collisions at RHIC-PHENIX

Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki, 305-8571, Japan

^* e-mail: konno@rcf.rhic.bnl.gov

Received: 6 August 2006
Published online: 27 October 2006

Abstract

Identified hadron analyses in heavy ion collisions at RHIC show particle-type dependences of hadron yields, especially a baryon/meson difference at intermediate p_T (2–5 GeV/c). In  =200 GeV Au+Au collisions, there is a significant suppression in meson yields compared to expectations from scaled p+p results. In contrast, a large enhancement of baryons relative to mesons is observed at intermediate p_T. The p_T reach of charged hadron identification has been extended by high statistics Au+Au data and the introduction of an aerogel Cherenkov detector. We can now study the identified charged hadron production at higher p_T using the PHENIX detector. In this paper, we present identified charged hadron p_T spectra, particle ratios, nuclear modification factors in Au+Au collisions at  =200 GeV.