Causality violations in realistic simulations of relativistic nuclear collisions
We show that relativistic causality is violated in the early stages of state-of-the-art heavy-ion hydrodynamic simulations of nuclear collisions. Up to 75% of the initial fluid cells violate nonlinear causality constraints, while superluminal propagation is observed by up to 15% the speed of light....
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://www.epj-conferences.org/articles/epjconf/pdf/2023/02/epjconf_sqm2022_06002.pdf |
| _version_ | 1811157442574155776 |
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| author | Plumberg Christopher Almaalol Dekrayat Dore Travis Noronha Jorge Noronha-Hostler Jacquelyn |
| author_facet | Plumberg Christopher Almaalol Dekrayat Dore Travis Noronha Jorge Noronha-Hostler Jacquelyn |
| author_sort | Plumberg Christopher |
| collection | DOAJ |
| description | We show that relativistic causality is violated in the early stages of state-of-the-art heavy-ion hydrodynamic simulations of nuclear collisions. Up to 75% of the initial fluid cells violate nonlinear causality constraints, while superluminal propagation is observed by up to 15% the speed of light. Only after 2-3 fm/c of evolution, do 50% of the fluid cells become definitely causal. Inclusion of pre-equilibrium evolution significantly reduces the number of acausal cells, but it does not eliminate them. Relativistic causality thus imposes constraints on the model parameter space of heavy-ion collision simulations. |
| first_indexed | 2024-04-10T05:07:39Z |
| format | Article |
| id | doaj.art-d477cfad8811481b839ebb24f4c8244c |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-04-10T05:07:39Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-d477cfad8811481b839ebb24f4c8244c2023-03-09T12:03:02ZengEDP SciencesEPJ Web of Conferences2100-014X2023-01-012760600210.1051/epjconf/202327606002epjconf_sqm2022_06002Causality violations in realistic simulations of relativistic nuclear collisionsPlumberg Christopher0Almaalol Dekrayat1Dore Travis2Noronha Jorge3Noronha-Hostler Jacquelyn4Illinois Center for Advanced Studies of the Universe, Department of Physics, University of Illinois at Urbana-ChampaignIllinois Center for Advanced Studies of the Universe, Department of Physics, University of Illinois at Urbana-ChampaignIllinois Center for Advanced Studies of the Universe, Department of Physics, University of Illinois at Urbana-ChampaignIllinois Center for Advanced Studies of the Universe, Department of Physics, University of Illinois at Urbana-ChampaignIllinois Center for Advanced Studies of the Universe, Department of Physics, University of Illinois at Urbana-ChampaignWe show that relativistic causality is violated in the early stages of state-of-the-art heavy-ion hydrodynamic simulations of nuclear collisions. Up to 75% of the initial fluid cells violate nonlinear causality constraints, while superluminal propagation is observed by up to 15% the speed of light. Only after 2-3 fm/c of evolution, do 50% of the fluid cells become definitely causal. Inclusion of pre-equilibrium evolution significantly reduces the number of acausal cells, but it does not eliminate them. Relativistic causality thus imposes constraints on the model parameter space of heavy-ion collision simulations.https://www.epj-conferences.org/articles/epjconf/pdf/2023/02/epjconf_sqm2022_06002.pdf |
| spellingShingle | Plumberg Christopher Almaalol Dekrayat Dore Travis Noronha Jorge Noronha-Hostler Jacquelyn Causality violations in realistic simulations of relativistic nuclear collisions EPJ Web of Conferences |
| title | Causality violations in realistic simulations of relativistic nuclear collisions |
| title_full | Causality violations in realistic simulations of relativistic nuclear collisions |
| title_fullStr | Causality violations in realistic simulations of relativistic nuclear collisions |
| title_full_unstemmed | Causality violations in realistic simulations of relativistic nuclear collisions |
| title_short | Causality violations in realistic simulations of relativistic nuclear collisions |
| title_sort | causality violations in realistic simulations of relativistic nuclear collisions |
| url | https://www.epj-conferences.org/articles/epjconf/pdf/2023/02/epjconf_sqm2022_06002.pdf |
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