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 |
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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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