Studying Jets with Identified Particles in PHENIX
arXiv:nucl-ex/0609037 · doi:10.1016/j.nuclphysa.2006.11.115
Abstract
A surprising excess of protons at intermediate , 2-5GeV/c, has been observed in Au+Au collisions at RHIC, for which the source is not known. In p+p collisions, particles at this arise from jet fragmentation, however the observed baryon yield in central Au+Au collisions are not compatible with the usual jet fragmentation function. Two particle correlations are a powerful probe for quantitatively understanding the modifications to jet fragmentation from interactions with the medium. Earlier studies have shown that the excess baryons do have jet-like partners, indicating a hard scattering origin. We present new results from a systematic study of two particle correlations as a function of trigger and partner particle species, charge, and centrality from the high statistics Au+Au dataset. p+p collisions are also analyzed as a reference.
4 pages, 3 figures, talk given at Hard Probes 2006