Directed Flow in Microscopic Models in Relativistic A+A Collisions
Evolution of directed flow of charged particles produced in relativistic heavy-ion collisions at energies 4 ≤ s ≤ 19.6 GeV is considered within two microscopic transport models, ultra-relativistic quantum molecular dynamics (UrQMD) and quark-gluon string model (QGSM). In both...
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| Format: | Article |
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MDPI AG
2019-03-01
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| Series: | Universe |
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| Online Access: | http://www.mdpi.com/2218-1997/5/3/69 |
| _version_ | 1811262737652645888 |
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| author | Larissa Bravina Yurii Kvasiuk Sergey Sivoklokov Oleksandr Vitiuk Evgeny Zabrodin |
| author_facet | Larissa Bravina Yurii Kvasiuk Sergey Sivoklokov Oleksandr Vitiuk Evgeny Zabrodin |
| author_sort | Larissa Bravina |
| collection | DOAJ |
| description | Evolution of directed flow of charged particles produced in relativistic heavy-ion collisions at energies 4 ≤ s ≤ 19.6 GeV is considered within two microscopic transport models, ultra-relativistic quantum molecular dynamics (UrQMD) and quark-gluon string model (QGSM). In both models, the directed flow of protons changes its sign at midrapidity from antiflow to normal flow with decreasing energy of collisions, whereas the flows of mesons and antiprotons remain antiflow-oriented. For lighter colliding systems, such as Cu+Cu or S+S, changing of the proton directed flow occurs at lower bombarding energies and for more central topologies compared to a heavy Au+Au system. The differences can be explained by dissimilar production zones of different hadrons and by the influence of spectators. Directed flows of most abundant hadronic species at midrapidity are found to be formed within t = 10–12 fm/c after the beginning of nuclear collision. The influence of hard and soft mean-field potentials on the directed flow is also studied. |
| first_indexed | 2024-04-12T19:30:48Z |
| format | Article |
| id | doaj.art-9c56350bee7e44408768189e556fc228 |
| institution | Directory Open Access Journal |
| issn | 2218-1997 |
| language | English |
| last_indexed | 2024-04-12T19:30:48Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Universe |
| spelling | doaj.art-9c56350bee7e44408768189e556fc2282022-12-22T03:19:20ZengMDPI AGUniverse2218-19972019-03-01536910.3390/universe5030069universe5030069Directed Flow in Microscopic Models in Relativistic A+A CollisionsLarissa Bravina0Yurii Kvasiuk1Sergey Sivoklokov2Oleksandr Vitiuk3Evgeny Zabrodin4Department of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, NorwayTaras Shevchenko National University of Kyiv, UA-01033 Kyiv, UkraineSkobeltsyn Institute of Nuclear Physics, Moscow State University, Moscow RU-119991, RussiaTaras Shevchenko National University of Kyiv, UA-01033 Kyiv, UkraineDepartment of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, NorwayEvolution of directed flow of charged particles produced in relativistic heavy-ion collisions at energies 4 ≤ s ≤ 19.6 GeV is considered within two microscopic transport models, ultra-relativistic quantum molecular dynamics (UrQMD) and quark-gluon string model (QGSM). In both models, the directed flow of protons changes its sign at midrapidity from antiflow to normal flow with decreasing energy of collisions, whereas the flows of mesons and antiprotons remain antiflow-oriented. For lighter colliding systems, such as Cu+Cu or S+S, changing of the proton directed flow occurs at lower bombarding energies and for more central topologies compared to a heavy Au+Au system. The differences can be explained by dissimilar production zones of different hadrons and by the influence of spectators. Directed flows of most abundant hadronic species at midrapidity are found to be formed within t = 10–12 fm/c after the beginning of nuclear collision. The influence of hard and soft mean-field potentials on the directed flow is also studied.http://www.mdpi.com/2218-1997/5/3/69relativistic heavy-ion collisionsmicroscopic transport modelsdirected flowmean-field potentials |
| spellingShingle | Larissa Bravina Yurii Kvasiuk Sergey Sivoklokov Oleksandr Vitiuk Evgeny Zabrodin Directed Flow in Microscopic Models in Relativistic A+A Collisions Universe relativistic heavy-ion collisions microscopic transport models directed flow mean-field potentials |
| title | Directed Flow in Microscopic Models in Relativistic A+A Collisions |
| title_full | Directed Flow in Microscopic Models in Relativistic A+A Collisions |
| title_fullStr | Directed Flow in Microscopic Models in Relativistic A+A Collisions |
| title_full_unstemmed | Directed Flow in Microscopic Models in Relativistic A+A Collisions |
| title_short | Directed Flow in Microscopic Models in Relativistic A+A Collisions |
| title_sort | directed flow in microscopic models in relativistic a a collisions |
| topic | relativistic heavy-ion collisions microscopic transport models directed flow mean-field potentials |
| url | http://www.mdpi.com/2218-1997/5/3/69 |
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