Recent Results on High pT Particle Production from The PHENIX Experiment

Particles with large transverse momentum (pT) produced during the initial phase of a nuclear collision can be used to probe the dense excited matter created during the collision process. The pT spectra of neutral pions and charged hadrons in Au + Au and d + Au collisions GeV are compared to p + p spectra at the same √(sNN). In central Au + Au collisions a factor of 4-5 suppression of high pT neutral pion and charged hadron yields is observed compared to expectations from scaled p + p results. No suppression of high pT particles is observed in d + Au collisions, suggesting that the observed suppression in central Au + Au collisions is due to the produced dense matter. (author)