Speaker
Dr
CHI YANG
(Shandong University)
Description
A primary goal of relativistic heavy-ion physics is to study the fundamental
properties of the created hot and dense medium. This medium is expected to emit thermal radiation in the form of dileptons and direct photons. Once produced, dileptons and direct photons traverse the medium with minimum interactions. This makes them ideal electromagnetic probes of the medium evolution by selecting different kinematics.
In this talk, we will present the dilepton and direct photon results at RHIC-STAR. The $e^{+}e^{-}$ pair mass distributions compared to hadronic cocktails and the direct virtual photon $p_T$ spectra compared to model predictions will be shown. These results are derived from the STAR beam energy scan phase I program. In addition, the low-$p_T$ $e^{+}e^{-}$ pair production in hadronic heavy ion collisions will be presented. Physics implications and opportunities will be discussed.
| Abstract Type | Talk |
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Primary author
Dr
CHI YANG
(Shandong University)
