# 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions

May 31, 2020 to June 5, 2020
Online
US/Central timezone

## Measurements of dielectron production in Au+Au collisions at $\sqrt{s_{\text{NN}}}$ = 27 and 54.4 GeV with the STAR experiment

Jun 2, 2020, 11:40 AM
20m
https://cern.zoom.us/j/96622048465

#### https://cern.zoom.us/j/96622048465

Oral Presentation Electroweak Probes

### Speaker

zhen wang (Shandong University)

### Description

Dielectron production is suggested as an excellent probe of the hot and dense medium created in relativistic heavy-ion collisions due to their minimal interactions with the partonic and hadronic medium. They can carry the information from the initial to the final stage of a collision. The study of the dielectron mass spectrum could help to disentangle various contributions. In the low mass region (LMR, $M_{ee} In this talk, we will present the latest dielectron spectra in Au+Au collisions at$\sqrt{s_{\text{NN}}}$= 27 and 54.4 GeV with the STAR experiment. The 1.5 B (1.3 B) minimum-bias events of Au+Au collisions at$\sqrt{s_{\text{NN}}}$= 27 (54.4) GeV taken in 2018 (2017) significantly enhance the precision of the in-medium$\rho\$ modification measurement compared to the STAR BES-I results. Lower heavy quark semi-leptonic decay contributions compared to those at top RHIC energies and the large data samples may allow the first extraction of the medium temperature with IMR dielectrons at RHIC. The physics implications of these measurements will be discussed and put into context of previous results.

Contribution type Contributed Talk Electroweak Probes STAR

### Presentation materials

 HP_2020_Dielectron_Zhen_v6.1.pdf Recording