Upper plot: points are measured $p/E_{tower}$ electron peak position as a function of the distance to the center of the tower. The solid line is from a calculation based on a full GEANT simulation of the detector response to electrons. Lower plot: points show measured energy deposited by electrons in the tower as a function of the momentum for distances to the center of the tower smaller than 2.0 cm. The first point is the electron equivalent energy of the minimum ionizing particles. The solid line is a second order polynomial fit of the data.

Mean values from GEANT simulations of the energy deposited in the EMC by various hadronic species as a function of momentum.

Spatial profiles of energy deposition in the EMC as a function of distance ($d$) from the hit point to the center of the tower for $\pi^{+}$ and $\pi^{-}$ from simulations and for positive and negative hadrons from data. The arrow indicates the distance corresponding to the border of a tower in 0 < $\eta$ < 0.2. An overall agreement between the shapes of the profiles is observed, with a small normalization difference.

Event-by-event ratio of the reconstructed electromagnetic energy for the most central events. The solid line is a gaussian fit.

Total Transverse Energy for 0 < $\eta$ < 1. The minimum bias distribution is presented as well as the distributions for the different centrality bins (see table III). The shaded area corresponds to the 5% most central bin. The main axis scale corresponds to the $E_{T}$ measured in the detector acceptance and the bottom axis is corrected to represent the extrapolation to full azimuthal acceptance.

⟨$dE_{T}/d\eta|_{\eta=0.5}$⟩ per $N_{part}$ pair vs. $N_{part}$. Upper panel: $N_{part}$ is obtained from Monte Carlo Glauber calculations. The lines show calculations using the HIJING model [27](solid), the EKRT saturation model [7] (dotted, Eq. 8) and the two component fit (dashed, see text). Results from WA98 [14] and PHENIX [15] are also shown. The grey bands correspond to overall systematic uncertainties, independent of $N_{part}$. Error bars are the quadrature sum of the errors on the measurements and the uncertainties on $N_{part}$ calculation. Lower panel: the same data are shown as in the upper panel but using and Optical Glauber model calculation for $N_{part}$. The line shows the same result from EKRT model calculation.

⟨$dE_{T}/d\eta|_{\eta=0.5}$⟩ per $N_{part}$ pair vs. $N_{part}$. Upper panel: $N_{part}$ is obtained from Monte Carlo Glauber calculations. The lines show calculations using the HIJING model [27](solid), the EKRT saturation model [7] (dotted, Eq. 8) and the two component fit (dashed, see text). Results from WA98 [14] and PHENIX [15] are also shown. The grey bands correspond to overall systematic uncertainties, independent of $N_{part}$. Error bars are the quadrature sum of the errors on the measurements and the uncertainties on $N_{part}$ calculation. Lower panel: the same data are shown as in the upper panel but using and Optical Glauber model calculation for $N_{part}$. The line shows the same result from EKRT model calculation.

$dE_{T}/dy$ (see text for details) per $N_{part}$ pair vs $sqrt{s_{NN}}$ for central events. In this figure $dE_{T}/dy/(0.5N_{part})$ is seen to grow logarithmicaly with $sqrt{s_{NN}}$. The error bar in the STAR point represents the total systematic uncertainty. The solid line is a EKRT model prediction [7], corrected for $d\eta/dy$, for central Au+Au collisions.

Upper panel - ⟨$dE_{T}/d\eta⟩/⟨dN_{ch}/d\eta$⟩ vs $N_{part}$. Predictions from HIJING simulations for Au+Au at 200 GeV are presented. Results from WA98 [14] and PHENIX [15] are also shown. The grey band corresponds to an overall normalization uncertainty for the STAR measurement. Bottom panel - Charged hadrons mean transverse momentum as a function of $N_{part}$ [37].

Upper panel - ⟨$dE_{T}/d\eta⟩/⟨dN_{ch}/d\eta$⟩ vs $N_{part}$. Predictions from HIJING simulations for Au+Au at 200 GeV are presented. Results from WA98 [14] and PHENIX [15] are also shown. The grey band corresponds to an overall normalization uncertainty for the STAR measurement. Bottom panel - Charged hadrons mean transverse momentum as a function of $N_{part}$ [37].

⟨$dE_{T}/d\eta⟩/⟨dN_{ch}/d\eta$⟩ vs $sqrt{s_{NN}}$ for central events. The error bar in the STAR point corresponds to the systematic uncertaintiy. A constant value of ∼ 800 MeV per charged particle, within errors, characterizes transverse energy production over this full energy range.

Energy dependence of the electromagnetic fraction of the transverse energy for a number of systems spanning SPS to RHIC energy for central events.

Participant number dependence of the electromagnetic fraction of the total transverse energy. The results are consistent with HIJING within errors over the full centrality range.