Charm quark evolution in the early stages of heavy-ion collisions
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2025
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| _version_ | 1866912899764584448 |
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| author | Singh, Mayank Kurian, Manu Schenke, Björn Jeon, Sangyong Gale, Charles |
| author_facet | Singh, Mayank Kurian, Manu Schenke, Björn Jeon, Sangyong Gale, Charles |
| contents | Heavy quarks are predominantly generated at the initial stage of relativistic heavy-ion collisions such that heavy flavor observables have the potential to provide information on the pre-equilibrium medium dynamics. In this study, we investigate the sensitivity of D-meson $R_{AA}$ and $v_2$ to early-time charm quark dynamics in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV. We employ the IP-Glasma+MUSIC+UrQMD framework to model the evolution of the bulk medium. Charm quarks are generated using PYTHIA with nuclear parton distribution functions and evolved using Langevin dynamics within MARTINI. We observe that even though there is significant momentum broadening in the earliest stage, D-meson $R_{AA}$ and $v_2$ are only weakly sensitive to pre-equilibrium interactions. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2509_18647 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Charm quark evolution in the early stages of heavy-ion collisions Singh, Mayank Kurian, Manu Schenke, Björn Jeon, Sangyong Gale, Charles Nuclear Theory High Energy Physics - Phenomenology Heavy quarks are predominantly generated at the initial stage of relativistic heavy-ion collisions such that heavy flavor observables have the potential to provide information on the pre-equilibrium medium dynamics. In this study, we investigate the sensitivity of D-meson $R_{AA}$ and $v_2$ to early-time charm quark dynamics in Pb+Pb collisions at $\sqrt{s_{NN}}=5.02$ TeV. We employ the IP-Glasma+MUSIC+UrQMD framework to model the evolution of the bulk medium. Charm quarks are generated using PYTHIA with nuclear parton distribution functions and evolved using Langevin dynamics within MARTINI. We observe that even though there is significant momentum broadening in the earliest stage, D-meson $R_{AA}$ and $v_2$ are only weakly sensitive to pre-equilibrium interactions. |
| title | Charm quark evolution in the early stages of heavy-ion collisions |
| topic | Nuclear Theory High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2509.18647 |