Direct photon-hadron correlation measurement and a way towards photon-triggered jets at RHIC

Workshop for young scientists on the physics of ultrarelativistic nucleus-nucleus collisions 2016

Sahoo, Nihar Ranjan^1

Cyclotron Institute, Texas A and M University, United States^1

关键词: Au+Au collisions;    Azimuthal correlations;    Charged hadrons;    Direct photons;    Hadron correlations;    Jet measurements;    Medium energy;    STAR experiment;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/832/1/012003/pdf
DOI  :  10.1088/1742-6596/832/1/012003

来源: IOP

【 摘 要 】

We report the results of γdir- and π0-hadron azimuthal correlations as a measure of the away-side jet-like correlated yields in central Au+Au and p+p collisions at GeV in the STAR experiment. The charged-hadron per-trigger yields at mid-rapidity with respect to high-pTγdirand π0in central Au+Au collisions are compared with p+p collisions. Within uncertainties, the same dependence of the suppression is observed for γdir- and π0- triggers. The results are compared with energy-loss model predictions. The γ - jet measurements can provide further understanding on the redistribution of in-medium energy loss. Ongoing γ - jet studies in the STAR experiment are also discussed.