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arXiv · 2504.02242

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

sPHENIX Collaboration·M. I. Abdulhamid·U. Acharya·E. R. Adams·G. Adawi·C. A. Aidala·Y. Akiba·M. Alfred·S. Ali·A. Alsayegh·S. Altaf·H. Amedi·D. M. Anderson·V. V. Andrieux·A. Angerami·N. Applegate·H. Aso·S. Aune·B. Azmoun·V. R. Bailey·D. Baranyai·S. Bathe·A. Bazilevsky·S. Bela·R. Belmont·J. Bennett·J. C. Bernauer·J. Bertaux·R. Bi·A. Bonenfant·S. Boose·C. Borchers·H. Bossi·R. Botsford·R. Boucher·A. Brahma·J. W. Bryan·D. Cacace·I. Cali·M. Chamizo-Llatas·S. B. Chauhan·A. Chen·D. Chen·J. Chen·K. Chen·K. Y. Chen·K. Y. Cheng·C. -Y. Chi·M. Chiu·J. Clement·E. W. Cline·M. Connors·E. Cook·R. Corliss·Y. Corrales Morales·E. Croft·N. d'Hose·A. Dabas·D. Dacosta·M. Daradkeh·S. J. Das·A. P. Dash·G. David·C. T. Dean·K. Dehmelt·X. Dong·A. Drees·J. M. Durham·A. Enokizono·H. Enyo·J. Escobar Cepero·R. Esha·B. Fadem·R. Feder·K. Finnelli·D. Firak·A. Francisco·J. Frantz·A. Frawley·K. Fujiki·M. Fujiwara·B. Garcia·P. Garg·G. Garmire·E. Gentry·Y. Go·C. Goblin·W. Goodman·Y. Goto·A. Grabas·O. Grachov·J. Granato·N. Grau·S. V. Greene·S. K. Grossberndt·R. Guidolini-Cecato·T. Hachiya·J. S. Haggerty·R. Hamilton·J. Hammond
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Abstract

This paper reports measurements of the transverse energy per unit pseudorapidity ($dE_{T}/d\eta$) 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 $dE_{T}/d\eta$ are presented for a range of centrality intervals and the average $dE_{T}/d\eta$ 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.

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sPHENIX Collaboration, M. I. Abdulhamid, U. Acharya, E. R. Adams, G. Adawi, C. A. Aidala, Y. Akiba, M. Alfred, S. Ali, A. Alsayegh, S. Altaf, H. Amedi, D. M. Anderson, V. V. Andrieux, A. Angerami, N. Applegate, H. Aso, S. Aune, B. Azmoun, V. R. Bailey, D. Baranyai, S. Bathe, A. Bazilevsky, S. Bela, R. Belmont, J. Bennett, J. C. Bernauer, J. Bertaux, R. Bi, A. Bonenfant, S. Boose, C. Borchers, H. Bossi, R. Botsford, R. Boucher, A. Brahma, J. W. Bryan, D. Cacace, I. Cali, M. Chamizo-Llatas, S. B. Chauhan, A. Chen, D. Chen, J. Chen, K. Chen, K. Y. Chen, K. Y. Cheng, C. -Y. Chi, M. Chiu, J. Clement, E. W. Cline, M. Connors, E. Cook, R. Corliss, Y. Corrales Morales, E. Croft, N. d'Hose, A. Dabas, D. Dacosta, M. Daradkeh, S. J. Das, A. P. Dash, G. David, C. T. Dean, K. Dehmelt, X. Dong, A. Drees, J. M. Durham, A. Enokizono, H. Enyo, J. Escobar Cepero, R. Esha, B. Fadem, R. Feder, K. Finnelli, D. Firak, A. Francisco, J. Frantz, A. Frawley, K. Fujiki, M. Fujiwara, B. Garcia, P. Garg, G. Garmire, E. Gentry, Y. Go, C. Goblin, W. Goodman, Y. Goto, A. Grabas, O. Grachov, J. Granato, N. Grau, S. V. Greene, S. K. Grossberndt, R. Guidolini-Cecato, T. Hachiya, J. S. Haggerty, R. Hamilton, J. Hammond. 2025-04-03. Measurement of the transverse energy density in Au+Au collisions at $\sqrt{s_{NN}} = 200$ GeV with the sPHENIX detector. https://doi.org/10.1103/h8d5-swg6

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