Recent results on jet energy loss and direct photons at RHIC
Brookhaven National Laboratory, Upton, NY, 11961, USA
Corresponding author: firstname.lastname@example.org
Measurements of the π0 and direct photon nuclear modification factors in p+p and A+A collisions in the PHENIX experiment at RHIC will be reviewed and recent results at GeV will be presented. Using for the first time the p+p reference measured in the same experiment instead of averaging world data the π0 suppression turns out to be almost as large at GeV as at GeV, implying gluon densities dNg/dy>800. Possible origins of photon suppression at high pT in GeV are discussed in light of the new results on photon RAA at GeV.
© EDP Sciences, Springer-Verlag, 2008