Scaling approach to rigid and soft nuclear deformation through flow fluctuations in high-energy nuclear collisions
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arXiv
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| Autori principali: | , , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866918139376173056 |
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| author | Liu, Lumeng Zhang, Chunjian Chen, Jinhui Jia, Jiangyong Huang, Xu-Guang Ma, Yu-Gang |
| author_facet | Liu, Lumeng Zhang, Chunjian Chen, Jinhui Jia, Jiangyong Huang, Xu-Guang Ma, Yu-Gang |
| contents | The nature of octupole deformation, whether static or vibrational, remains an open question in nuclear physics. Here, we propose a scaling approach to probe this ambiguity by triangular flow fluctuations using multi-particle cumulants, $c_{3,\varepsilon}\{4\}$, in relativistic $^{238}$U+$^{238}$U collisions. We demonstrate that both $|c_{3,\varepsilon}\{4\}|$ and the ratio $|c_{3,\varepsilon}\{4\}/c^2_{3,\varepsilon}\{2\}|$ scale linearly with the fourth-order moment of octupole deformation, $\langle β^4_{3,\mathrm{U}} \rangle$. Combined with the known linear relation of $c_{3,\varepsilon}\{2\}$ to $\langle β^2_{3,\mathrm{U}} \rangle$, this new relation provides a direct extraction of both the mean and variance of the octupole deformation fluctuations, finally discriminating between static and dynamic origins. This work establishes a new tool to probe the static and dynamic collective modes in high-energy nuclear collisions, advancing a significant step toward refining the initial conditions of quark-gluon plasma. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_09376 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Scaling approach to rigid and soft nuclear deformation through flow fluctuations in high-energy nuclear collisions Liu, Lumeng Zhang, Chunjian Chen, Jinhui Jia, Jiangyong Huang, Xu-Guang Ma, Yu-Gang Nuclear Theory Nuclear Experiment The nature of octupole deformation, whether static or vibrational, remains an open question in nuclear physics. Here, we propose a scaling approach to probe this ambiguity by triangular flow fluctuations using multi-particle cumulants, $c_{3,\varepsilon}\{4\}$, in relativistic $^{238}$U+$^{238}$U collisions. We demonstrate that both $|c_{3,\varepsilon}\{4\}|$ and the ratio $|c_{3,\varepsilon}\{4\}/c^2_{3,\varepsilon}\{2\}|$ scale linearly with the fourth-order moment of octupole deformation, $\langle β^4_{3,\mathrm{U}} \rangle$. Combined with the known linear relation of $c_{3,\varepsilon}\{2\}$ to $\langle β^2_{3,\mathrm{U}} \rangle$, this new relation provides a direct extraction of both the mean and variance of the octupole deformation fluctuations, finally discriminating between static and dynamic origins. This work establishes a new tool to probe the static and dynamic collective modes in high-energy nuclear collisions, advancing a significant step toward refining the initial conditions of quark-gluon plasma. |
| title | Scaling approach to rigid and soft nuclear deformation through flow fluctuations in high-energy nuclear collisions |
| topic | Nuclear Theory Nuclear Experiment |
| url | https://arxiv.org/abs/2509.09376 |