Coordinate versus momentum cuts and effects of collective flow on critical fluctuations
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arXiv
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| Autores principales: | , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866909262279606272 |
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| author | Kuznietsov, Volodymyr A. Gorenstein, Mark I. Koch, Volker Vovchenko, Volodymyr |
| author_facet | Kuznietsov, Volodymyr A. Gorenstein, Mark I. Koch, Volker Vovchenko, Volodymyr |
| contents | We analyze particle number fluctuations in the crossover region near the critical endpoint of a first-order phase transition by utilizing molecular dynamics simulations of the classical Lennard-Jones fluid. We extend our previous study [V.A. Kuznietsov et al., Phys. Rev. C 105, 044903 (2022)] by incorporating longitudinal collective flow. The scaled variance of particle number distribution inside different coordinate and momentum space acceptances is computed through ensemble averaging and found to agree with earlier results obtained using time averaging, validating the ergodic hypothesis for fluctuation observables. Presence of a sizable collective flow is found to be essential for observing large fluctuations from the critical point in momentum space acceptances. We discuss our findings in the context of heavy-ion collisions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_00476 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Coordinate versus momentum cuts and effects of collective flow on critical fluctuations Kuznietsov, Volodymyr A. Gorenstein, Mark I. Koch, Volker Vovchenko, Volodymyr Nuclear Theory High Energy Physics - Phenomenology We analyze particle number fluctuations in the crossover region near the critical endpoint of a first-order phase transition by utilizing molecular dynamics simulations of the classical Lennard-Jones fluid. We extend our previous study [V.A. Kuznietsov et al., Phys. Rev. C 105, 044903 (2022)] by incorporating longitudinal collective flow. The scaled variance of particle number distribution inside different coordinate and momentum space acceptances is computed through ensemble averaging and found to agree with earlier results obtained using time averaging, validating the ergodic hypothesis for fluctuation observables. Presence of a sizable collective flow is found to be essential for observing large fluctuations from the critical point in momentum space acceptances. We discuss our findings in the context of heavy-ion collisions. |
| title | Coordinate versus momentum cuts and effects of collective flow on critical fluctuations |
| topic | Nuclear Theory High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2404.00476 |