Hard scattering in Au+Au, d+Au and p+p collisions at sqrt(s_NN) = 200 GeV: Latest results from PHENIX @ RHIC

by David d'Enterria (Nevis Labs Columbia University, NY)

Tuesday 1 Jul 2003, 14:00 → 15:00 Europe/Zurich

40-SS-C01 (CERN)

I will review the high pT results for identified hadrons (pi0, p, pbar) in Au+Au, d+Au and p+p collisions at sqrt(s_NN) = 200 GeV as measured by PHENIX in Run-2 and Run-3 at RHIC. Two of the most interesting observations of heavy-ion reactions at collider energies are in the hard scattering sector where central Au+Au data show a very different behaviour compared to p+p and peripheral Au+Au collisions at the same sqrt(s). The so-called ''high p_T pi0 suppression'' and the ''anomalous baryon/meson ratio'' observed in central Au+Au collisions will be reviewed and compared to various theoretical calculations based on different strongly interacting medium scenarios (final-state partonic energy loss, initial-state gluon saturation, ...). Disentagling between these different physical interpretations can be done experimentally by studying the properties of "cold" nuclear matter in p,d+Au collisions. The results from recent d+Au collisions, where final-state effects such as jet quenching are absent, will be also presented.

Organiser(s): Yiota Foka and Urs Wiedemann
Information: http://home.cern.ch/a/alicedoc/www/chic/