Measurement of the transverse energy density in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV with the sPHENIX detector

Abstract

This paper reports measurements of the transverse energy per unit pseudorapidity ($d{E}_T/d\eta$) produced in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV, performed with the sPHENIX detector at the Relativistic Heavy Ion Collider (RHIC). The results cover the pseudorapidity range $\left|\eta \right|<1.1$ and constitute the first such measurement performed using a hadronic calorimeter at RHIC. Measurements of $d{E}_T/d\eta$ are presented for a range of centrality intervals and the average $d{E}_T/d\eta$ as a function of the number of participating nucleons, $N_{\mathrm{part}}$, is compared to a variety of Monte Carlo heavy-ion event generators. The results are in agreement with previous measurements at RHIC, and feature an improved granularity in $\eta$ and improved precision in low-$N_{\mathrm{part}}$ events.

arXiv comment18 pages total, 6 figures, 2 tables. All figures and tables can be found at https://www.sphenix.bnl.gov/PublicResults/sPH-BULK-2025-02 , data available at https://www.hepdata.net/record/159889

References in corpus (24)

• The order of the quantum chromodynamics transition predicted by the standard model of particle physics
• A Multi-Phase Transport Model for Relativistic Heavy Ion Collisions
• Heavy Ion Collisions: The Big Picture, and the Big Questions
• Hadron production in nuclear collisions at RHIC and high density QCD
• Parton-Based Gribov-Regge Theory
• Systematic Studies of the Centrality and sqrt(s_NN) Dependence of dE_T/deta and dN_ch/deta in Heavy Ion Collisions at Mid-rapidity
• Nuclear Stopping in Au+Au Collisions at sqrt(sNN) = 200 GeV
• Charged Meson Rapidity Distributions in central Au+Au Collisions at sqrt(s_nn) = 200 GeV
• The RHIC Zero Degree Calorimeter
• Improved version of the PHOBOS Glauber Monte Carlo
• Spectra and ratios of identified particles in Au+Au and d+Au collisions at sqrt(s_NN)=200 GeV
• Measurement of the mid-rapidity transverse energy distribution from $\sqrt{s_{NN}}=130$ GeV Au+Au collisions at RHIC
• Energy and Centrality Dependence of Rapidity Densities at RHIC
• Centrality categorization for R_{p(d)+A} in high-energy collisions
• Nucleon participants or quark participants?
• Measurement of the pseudorapidity and centrality dependence of the transverse energy density in PbPb collisions at sqrt(s[NN]) = 2.76 TeV
• Transverse-energy distributions at midrapidity in $p$$+$$p$, $d$$+$Au, and Au$+$Au collisions at $\sqrt{s_{{}_{NN}}}=62.4$--200~GeV and implications for particle-production models
• Measurements of transverse energy distributions in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV
• Measurement of transverse energy at midrapidity in Pb-Pb collisions at $\sqrt{s_{\mathrm{NN}}}=2.76$ TeV
• Design and Beam Test Results for the sPHENIX Electromagnetic and Hadronic Calorimeter Prototypes
• A Start-Timing Detector for the Collider Experiment PHENIX at RHIC-BNL
• Predictions for the sPHENIX physics program
• Design and Beam Test Results for the 2D Projective sPHENIX Electromagnetic Calorimeter Prototype
• Jet-Underlying Event Separation Method for Heavy Ion Collisions at the Relativistic Heavy Ion Collider