Is there a unique thermal dilepton source in the reactions Pb(158 AGeV) + Au, Pb?

TL;DR

This paper analyzes dilepton measurements from heavy-ion collisions, suggesting a single thermal source significantly influences the invariant mass and transverse momentum spectra.

Contribution

It provides evidence for a unique thermal dilepton source in Pb+Au and Pb collisions at 158 AGeV, advancing understanding of the collision dynamics.

Findings

Identification of a dominant thermal dilepton source

Influence on invariant mass spectra

Impact on transverse momentum distributions

Abstract

An analysis of the dilepton measurements of the reactions Pb(158 A$\cdot$GeV) + Au, Pb by the CERES and NA50 collaborations points to a unique thermal source contributing to the invariant mass and transverse momentum spectra.