Directed Flow in Heavy-Ion Collisions and Its Implications for Astrophysics
Analysis of directed flow ( v 1 ) of protons, antiprotons and pions in heavy-ion collisions is performed in the range of collision energies s N N = 2.7–39 GeV. Simulations have been done within a three-fluid model employing a purely hadronic equation of state (EoS) and two versions...
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| Format: | Article |
| Language: | English |
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MDPI AG
2017-11-01
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| Series: | Universe |
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| Online Access: | https://www.mdpi.com/2218-1997/3/4/79 |
| _version_ | 1798038288342188032 |
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| author | Yuri B. Ivanov |
| author_facet | Yuri B. Ivanov |
| author_sort | Yuri B. Ivanov |
| collection | DOAJ |
| description | Analysis of directed flow ( v 1 ) of protons, antiprotons and pions in heavy-ion collisions is performed in the range of collision energies s N N = 2.7–39 GeV. Simulations have been done within a three-fluid model employing a purely hadronic equation of state (EoS) and two versions of the EoS with deconfinement transitions: a first-order phase transition and a smooth crossover transition. The crossover EoS is unambiguously preferable for the description of experimental data at lower collision energies s N N ≲ 20 Gev. However, at higher collision energies s N N ≳ 20 Gev. the purely hadronic EoS again becomes advantageous. This indicates that the deconfinement EoS in the quark-gluon sector should be stiffer at high baryon densities than those used in the calculation. The latter finding is in agreement with that discussed in astrophysics in connection with existence of hybrid stars with masses up to about two solar masses. |
| first_indexed | 2024-04-11T21:38:09Z |
| format | Article |
| id | doaj.art-053c389fc00247c993a00976505c3e7c |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-04-11T21:38:09Z |
| publishDate | 2017-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-053c389fc00247c993a00976505c3e7c2022-12-22T04:01:40ZengMDPI AGUniverse2218-19972017-11-01347910.3390/universe3040079universe3040079Directed Flow in Heavy-Ion Collisions and Its Implications for AstrophysicsYuri B. Ivanov0National Research Centre (NRC) “Kurchatov Institute”, Moscow 123182, RussiaAnalysis of directed flow ( v 1 ) of protons, antiprotons and pions in heavy-ion collisions is performed in the range of collision energies s N N = 2.7–39 GeV. Simulations have been done within a three-fluid model employing a purely hadronic equation of state (EoS) and two versions of the EoS with deconfinement transitions: a first-order phase transition and a smooth crossover transition. The crossover EoS is unambiguously preferable for the description of experimental data at lower collision energies s N N ≲ 20 Gev. However, at higher collision energies s N N ≳ 20 Gev. the purely hadronic EoS again becomes advantageous. This indicates that the deconfinement EoS in the quark-gluon sector should be stiffer at high baryon densities than those used in the calculation. The latter finding is in agreement with that discussed in astrophysics in connection with existence of hybrid stars with masses up to about two solar masses.https://www.mdpi.com/2218-1997/3/4/79heavy-ion collisionsdirected flowhydrodynamicsdeconfinementhybrid stars |
| spellingShingle | Yuri B. Ivanov Directed Flow in Heavy-Ion Collisions and Its Implications for Astrophysics Universe heavy-ion collisions directed flow hydrodynamics deconfinement hybrid stars |
| title | Directed Flow in Heavy-Ion Collisions and Its Implications for Astrophysics |
| title_full | Directed Flow in Heavy-Ion Collisions and Its Implications for Astrophysics |
| title_fullStr | Directed Flow in Heavy-Ion Collisions and Its Implications for Astrophysics |
| title_full_unstemmed | Directed Flow in Heavy-Ion Collisions and Its Implications for Astrophysics |
| title_short | Directed Flow in Heavy-Ion Collisions and Its Implications for Astrophysics |
| title_sort | directed flow in heavy ion collisions and its implications for astrophysics |
| topic | heavy-ion collisions directed flow hydrodynamics deconfinement hybrid stars |
| url | https://www.mdpi.com/2218-1997/3/4/79 |
| work_keys_str_mv | AT yuribivanov directedflowinheavyioncollisionsanditsimplicationsforastrophysics |