Study of Lambda polarization at RHIC BES and LHC energies
In hydrodynamic approach to relativistic heavy ion collisions, hadrons with nonzero spin, produced out of the hydrodynamic medium, can acquire polarization via spin-vorticity thermodynamic coupling mechanism. The hydrodynamical quantity steering the polarization is the thermal vorticity, that is min...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2018-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201817117001 |
| _version_ | 1818589978969505792 |
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| author | Karpenko Iurii Becattini Francesco |
| author_facet | Karpenko Iurii Becattini Francesco |
| author_sort | Karpenko Iurii |
| collection | DOAJ |
| description | In hydrodynamic approach to relativistic heavy ion collisions, hadrons with nonzero spin, produced out of the hydrodynamic medium, can acquire polarization via spin-vorticity thermodynamic coupling mechanism. The hydrodynamical quantity steering the polarization is the thermal vorticity, that is minus the antisymmetric part of the
gradient of four-temperature field. Based on this mechanism there have been several calculations in hydrodynamic and non-hydrodynamic models for non-central heavy ion collisions in the RHIC Beam Energy Scan energy range, showing that the amount of polarization of produced Λ hyperons ranges from few percents to few permille, and decreases with collision energy. We report on an extension of our existing calculation of global Λ polarization in UrQMD+vHLLE model to full RHIC and LHC energies, and discuss the component of polarization along the beam direction, which is the dominant one at high energies. |
| first_indexed | 2024-12-16T09:49:14Z |
| format | Article |
| id | doaj.art-14888860edb54271806baa5ad3f68379 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-16T09:49:14Z |
| publishDate | 2018-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-14888860edb54271806baa5ad3f683792022-12-21T22:36:07ZengEDP SciencesEPJ Web of Conferences2100-014X2018-01-011711700110.1051/epjconf/201817117001epjconf_sqm2018_17001Study of Lambda polarization at RHIC BES and LHC energiesKarpenko IuriiBecattini FrancescoIn hydrodynamic approach to relativistic heavy ion collisions, hadrons with nonzero spin, produced out of the hydrodynamic medium, can acquire polarization via spin-vorticity thermodynamic coupling mechanism. The hydrodynamical quantity steering the polarization is the thermal vorticity, that is minus the antisymmetric part of the gradient of four-temperature field. Based on this mechanism there have been several calculations in hydrodynamic and non-hydrodynamic models for non-central heavy ion collisions in the RHIC Beam Energy Scan energy range, showing that the amount of polarization of produced Λ hyperons ranges from few percents to few permille, and decreases with collision energy. We report on an extension of our existing calculation of global Λ polarization in UrQMD+vHLLE model to full RHIC and LHC energies, and discuss the component of polarization along the beam direction, which is the dominant one at high energies.https://doi.org/10.1051/epjconf/201817117001 |
| spellingShingle | Karpenko Iurii Becattini Francesco Study of Lambda polarization at RHIC BES and LHC energies EPJ Web of Conferences |
| title | Study of Lambda polarization at RHIC BES and LHC energies |
| title_full | Study of Lambda polarization at RHIC BES and LHC energies |
| title_fullStr | Study of Lambda polarization at RHIC BES and LHC energies |
| title_full_unstemmed | Study of Lambda polarization at RHIC BES and LHC energies |
| title_short | Study of Lambda polarization at RHIC BES and LHC energies |
| title_sort | study of lambda polarization at rhic bes and lhc energies |
| url | https://doi.org/10.1051/epjconf/201817117001 |
| work_keys_str_mv | AT karpenkoiurii studyoflambdapolarizationatrhicbesandlhcenergies AT becattinifrancesco studyoflambdapolarizationatrhicbesandlhcenergies |