Probing the onset of collectivity via scaled particle spectra in ultrarelativistic nuclear collisions
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arXiv
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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866918132489125888 |
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| author | Domingues, Thiago S. Gardim, Fernando G. Chinellato, David D. Denicol, Gabriel S. Giannini, Andre V. Luzum, Matthew Muncinelli, Cicero D. Noronha, Jorge da Silva, Tiago Nunes Takahashi, Jun Torrieri, Giorgio |
| author_facet | Domingues, Thiago S. Gardim, Fernando G. Chinellato, David D. Denicol, Gabriel S. Giannini, Andre V. Luzum, Matthew Muncinelli, Cicero D. Noronha, Jorge da Silva, Tiago Nunes Takahashi, Jun Torrieri, Giorgio |
| contents | We identify a novel scaling in the transverse momentum spectra of produced particles, obtained by removing the global scales of multiplicity and mean transverse momentum. Hydrodynamic simulations and experimental data reveal an almost universal scaled spectrum across centralities, systems, and even small systems, pointing to its origin in the collective, fluid-like dynamics of the QGP. Comparing this observable with Bayesian a priori distributions shows its independent constraining power on QCD transport properties, while also exposing limitations of current models. A detailed posterior analysis will be pursued in future work, opening a new avenue to refine our understanding of collectivity in heavy-ion collisions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2508_21176 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Probing the onset of collectivity via scaled particle spectra in ultrarelativistic nuclear collisions Domingues, Thiago S. Gardim, Fernando G. Chinellato, David D. Denicol, Gabriel S. Giannini, Andre V. Luzum, Matthew Muncinelli, Cicero D. Noronha, Jorge da Silva, Tiago Nunes Takahashi, Jun Torrieri, Giorgio Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment We identify a novel scaling in the transverse momentum spectra of produced particles, obtained by removing the global scales of multiplicity and mean transverse momentum. Hydrodynamic simulations and experimental data reveal an almost universal scaled spectrum across centralities, systems, and even small systems, pointing to its origin in the collective, fluid-like dynamics of the QGP. Comparing this observable with Bayesian a priori distributions shows its independent constraining power on QCD transport properties, while also exposing limitations of current models. A detailed posterior analysis will be pursued in future work, opening a new avenue to refine our understanding of collectivity in heavy-ion collisions. |
| title | Probing the onset of collectivity via scaled particle spectra in ultrarelativistic nuclear collisions |
| topic | Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2508.21176 |