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| Main Authors: | , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2506.07941 |
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| _version_ | 1866918051148988416 |
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| author | Magdy, Niseem Silva, Antonio Martin, Christal Hakanson, Josie Bartoshesky, Olivia Hill, Aidan Nattrass, Christine |
| author_facet | Magdy, Niseem Silva, Antonio Martin, Christal Hakanson, Josie Bartoshesky, Olivia Hill, Aidan Nattrass, Christine |
| contents | We present a comprehensive comparison of PHENIX measurements of transverse energy production ($dE_T/dη$) and charged-particle multiplicity ($dN/dη$) at midrapidity to simulations from PYTHIA-8, AMPT, HIJING, and SMASH. These comparisons span both small systems (d+Au, $^3$He+Au) and large systems (Cu+Cu, Cu+Au, Au+Au, and U+U) at $\sqrt{s_{NN}}$ $\sim$ 200~GeV and Au+Au over a range of beam energies $\sqrt{s_{NN}} = 7.7$--200~GeV. Using the Rivet framework, we assess the performance of these models. While general trends are captured, significant deviations persist, particularly in low-energy and peripheral collisions, underscoring the need for improved modeling of baryon stopping and energy deposition mechanisms. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_07941 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Model Comparisons of Transverse Energy and Charged-Particle Multiplicity in A+A Collisions at Midrapidity from $\sqrt{s_{NN}}$ $=$ 7.7 to 200~GeV Magdy, Niseem Silva, Antonio Martin, Christal Hakanson, Josie Bartoshesky, Olivia Hill, Aidan Nattrass, Christine Nuclear Experiment High Energy Physics - Phenomenology Nuclear Theory We present a comprehensive comparison of PHENIX measurements of transverse energy production ($dE_T/dη$) and charged-particle multiplicity ($dN/dη$) at midrapidity to simulations from PYTHIA-8, AMPT, HIJING, and SMASH. These comparisons span both small systems (d+Au, $^3$He+Au) and large systems (Cu+Cu, Cu+Au, Au+Au, and U+U) at $\sqrt{s_{NN}}$ $\sim$ 200~GeV and Au+Au over a range of beam energies $\sqrt{s_{NN}} = 7.7$--200~GeV. Using the Rivet framework, we assess the performance of these models. While general trends are captured, significant deviations persist, particularly in low-energy and peripheral collisions, underscoring the need for improved modeling of baryon stopping and energy deposition mechanisms. |
| title | Model Comparisons of Transverse Energy and Charged-Particle Multiplicity in A+A Collisions at Midrapidity from $\sqrt{s_{NN}}$ $=$ 7.7 to 200~GeV |
| topic | Nuclear Experiment High Energy Physics - Phenomenology Nuclear Theory |
| url | https://arxiv.org/abs/2506.07941 |