Is different Λ and Λ¯ polarization caused by different spatio-temporal freeze-out picture?
Thermal vorticity in non-central Au+Au collisions at energies 7.7≤s≤62.4 GeV is calculated within the UrQMD transport model. Tracing the Λ and Λ¯ hyperons back to their last interaction point we were able to obtain the temperature and the chemical potentials at the time of emission by fitting the ex...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020-04-01
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| Series: | Physics Letters B |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0370269320301027 |
| _version_ | 1818283096117608448 |
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| author | O. Vitiuk L.V. Bravina E.E. Zabrodin |
| author_facet | O. Vitiuk L.V. Bravina E.E. Zabrodin |
| author_sort | O. Vitiuk |
| collection | DOAJ |
| description | Thermal vorticity in non-central Au+Au collisions at energies 7.7≤s≤62.4 GeV is calculated within the UrQMD transport model. Tracing the Λ and Λ¯ hyperons back to their last interaction point we were able to obtain the temperature and the chemical potentials at the time of emission by fitting the extracted bulk characteristics of hot and dense medium to statistical model of ideal hadron gas. Then the polarization of both hyperons was calculated. The polarization of Λ and Λ¯ increases with decreasing energy of nuclear collisions. The stronger polarization of Λ¯ is explained by the different space-time distributions of Λ and Λ¯ and by different freeze-out conditions of both hyperons. Keywords: Relativistic heavy-ion collisions, Vorticity, Polarization, Transport models |
| first_indexed | 2024-12-13T00:31:28Z |
| format | Article |
| id | doaj.art-d7cc19e811ac451f89751593667e0d9f |
| institution | Directory Open Access Journal |
| issn | 0370-2693 |
| language | English |
| last_indexed | 2024-12-13T00:31:28Z |
| publishDate | 2020-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Physics Letters B |
| spelling | doaj.art-d7cc19e811ac451f89751593667e0d9f2022-12-22T00:05:19ZengElsevierPhysics Letters B0370-26932020-04-01803Is different Λ and Λ¯ polarization caused by different spatio-temporal freeze-out picture?O. Vitiuk0L.V. Bravina1E.E. Zabrodin2Department of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, Norway; Taras Shevchenko National University of Kyiv, UA-01033 Kyiv, UkraineDepartment of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, Norway; Corresponding author.Department of Physics, University of Oslo, PB 1048 Blindern, N-0316 Oslo, Norway; Skobeltzyn Institute for Nuclear Physics, Moscow State University, RU-119899 Moscow, RussiaThermal vorticity in non-central Au+Au collisions at energies 7.7≤s≤62.4 GeV is calculated within the UrQMD transport model. Tracing the Λ and Λ¯ hyperons back to their last interaction point we were able to obtain the temperature and the chemical potentials at the time of emission by fitting the extracted bulk characteristics of hot and dense medium to statistical model of ideal hadron gas. Then the polarization of both hyperons was calculated. The polarization of Λ and Λ¯ increases with decreasing energy of nuclear collisions. The stronger polarization of Λ¯ is explained by the different space-time distributions of Λ and Λ¯ and by different freeze-out conditions of both hyperons. Keywords: Relativistic heavy-ion collisions, Vorticity, Polarization, Transport modelshttp://www.sciencedirect.com/science/article/pii/S0370269320301027 |
| spellingShingle | O. Vitiuk L.V. Bravina E.E. Zabrodin Is different Λ and Λ¯ polarization caused by different spatio-temporal freeze-out picture? Physics Letters B |
| title | Is different Λ and Λ¯ polarization caused by different spatio-temporal freeze-out picture? |
| title_full | Is different Λ and Λ¯ polarization caused by different spatio-temporal freeze-out picture? |
| title_fullStr | Is different Λ and Λ¯ polarization caused by different spatio-temporal freeze-out picture? |
| title_full_unstemmed | Is different Λ and Λ¯ polarization caused by different spatio-temporal freeze-out picture? |
| title_short | Is different Λ and Λ¯ polarization caused by different spatio-temporal freeze-out picture? |
| title_sort | is different λ and λ¯ polarization caused by different spatio temporal freeze out picture |
| url | http://www.sciencedirect.com/science/article/pii/S0370269320301027 |
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