Dielectron production from $\sqrt{s_{NN}}$ = 200 GeV Au + Au collisions at STAR

TL;DR

This paper reports the first dielectron measurements in 200 GeV Au+Au collisions at STAR, analyzing in-medium modifications and thermal radiation to understand the quark-gluon plasma.

Contribution

It provides the initial dielectron data at STAR and compares results to hadron decay models to explore medium effects and thermal radiation.

Findings

Evidence of in-medium vector meson modification

Observation of thermal radiation from quark-gluon plasma

Analysis of transverse mass slope parameters

Abstract

We present the first STAR dielectron measurement in 200 GeV Au + Au collisions. Results are compared to hadron decay cocktail to search for vector meson in-medium modification in low mass region and quark gluon plasma thermal radiation in the intermediate mass region. The transverse mass slope parameters in the intermediate mass region is also discussed.