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

TL;DR

This paper reports the first dielectron measurements at 200 GeV in p + p and Au + Au collisions, comparing results to models to investigate in-medium modifications and quark-gluon plasma radiation.

Contribution

It provides the first STAR dielectron data at this energy, analyzing vector meson modifications and thermal radiation in heavy-ion collisions.

Findings

Comparison with hadron decay cocktails shows potential in-medium modifications.

Evidence of thermal radiation from quark-gluon plasma in intermediate mass region.

Analysis of omega to electron-positron spectra and transverse mass distributions.

Abstract

We present the first STAR dielectron measurement in 200 GeV p + p and Au + Au collisions. Results are compared to hadron decay cocktails to search for vector meson in-medium modification in low mass region and quark gluon plasma thermal radiation in the intermediate mass region. The $\omega \rightarrow e^{+}e^{-}$ spectra and the transverse mass distribution in the intermediate mass region are also discussed.