Azimuthal angle two particle correlations have been shown to be a powerful
probe for extracting novel features of the interaction between hard scattered
partons and the medium produced in Au+Au collisions at RHIC. At intermediate
pTโ, 2-5GeV/c, the jets have been shown to be significantly modified in both
their particle composition and their angular distribution compared to p+p
collisions. Additionally, angular two particle correlations with identified
hadrons provide information on the possible role of modified hadronization
scenarios such as partonic recombination, which might allow medium modified jet
fragmentation by connecting hard scattered partons to low pTโ thermal
partons.
PHENIX has excellent particle identification capabilities and has developed
robust techniques for extracting jet correlations from the large underlying
event. We present recent PHENIX results from Au+Au collisions for a variety of
pTโ and particle type combinations. We also present p+p measurements as a
baseline. We show evidence that protons and anti-protons in the pTโ region of
enhanced baryon and anti-baryon single particle production are produced in
close angle pairs of opposite charge and that the strong modifications to the
away side shape observed for charged hadron correlations are also present when
baryons are correlated.Comment: talk given at XIth International Workshop on Correlations and
Fluctuations in Multiparticle Production, Hangzhou China November 21-24 200