Fig. 3: Dielectron invariant-mass spectra.
From: Temperature measurement of Quark-Gluon plasma at different stages
a Fully corrected inclusive dielectron mass spectra (black dots) compared to the physics background (dashed lines and shaded lines) in Au+Au minimum-bias (0-80% centrality) collisions at \(\sqrt{{s}_{{{{\rm{NN}}}}}}=\) 54.4 and 27 GeV. b Thermal dielectron mass spectra from 54.4 GeV (red squares) and 27 GeV (black dots) compared to the NA60 thermal dimuon data (magenta inverted triangles). ll denotes the dielectron or dimuon pairs. Dashed lines show the fitting curves for the corresponding temperature extractions. Dot-dashed lines display the expected vacuum ρ spectra (f BW(M)) based on the p+p48 and e++e−49 collision data. Vertical bars and boxes around data points represent the statistical and systematic uncertainties, respectively. Downward arrows indicate statistical uncertainties exceeding 100%.
