Photons and Dilepton Measurements in PHENIX

29th Winter Workshop on Nuclear Dynamics

Rolnick, Sky^1

UC Riverside, United States^1

关键词: Au+Au collisions;    Current theoretical models;    Heavy ion collision;    High temperature;    Measurements of;    Space-time evolution;    Thermal photons;    Thermalization;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/458/1/012015/pdf
DOI  :  10.1088/1742-6596/458/1/012015

来源: IOP

【 摘 要 】

Dileptons and direct photons are penetrating probes of the QGP and are emitted during the entire space-time evolution of heavy ion collisions. Recent measurements of direct photons indicate an excess of photons with 1 Tcollscaled p+p yield. The large excess, interpreted as thermal radiation, can be fit to a variety of models consistent with high temperatures and low thermalization times. Measurements also indicate a large v2for pT2is difficult to reconcile with current theoretical models. In these proceedings we will summarize the latest measurements of direct photons and dileptons produced at RHIC energies including recently released dielectron spectrum from p+p, dAu, and Au+Au collisions in PHENIX.