A study of $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ polarization splitting by meson field in PICR hydrodynamic model
Abstract With the PICR hydrodynamic model, we study the polarization splitting between $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ at RHIC BES energy range, based on the meson field mechanism. Our results fit to the experimental data fairly well. Besides, two unexpected effect emerges: (1) the b...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2021-01-01
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| Series: | European Physical Journal C: Particles and Fields |
| Online Access: | https://doi.org/10.1140/epjc/s10052-021-08828-z |
| _version_ | 1818383079674216448 |
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| author | Yilong Xie Gang Chen Laszlo Pal Csernai |
| author_facet | Yilong Xie Gang Chen Laszlo Pal Csernai |
| author_sort | Yilong Xie |
| collection | DOAJ |
| description | Abstract With the PICR hydrodynamic model, we study the polarization splitting between $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ at RHIC BES energy range, based on the meson field mechanism. Our results fit to the experimental data fairly well. Besides, two unexpected effect emerges: (1) the baryon density gradient has non-trivial and negative contribution to the polarization splitting; (2) for 7.7 GeV Au+Au collisions within the centrality range of 20–50%, the polarization splitting surprisingly increases with the centrality decreases. The second effect might help to explain the significant signal of polarization splitting measured in STAR’s Au+Au 7.7 Gev collisions. |
| first_indexed | 2024-12-14T03:00:40Z |
| format | Article |
| id | doaj.art-a204d0b5c7fc4d82b8eb777a04c6390d |
| institution | Directory Open Access Journal |
| issn | 1434-6044 1434-6052 |
| language | English |
| last_indexed | 2024-12-14T03:00:40Z |
| publishDate | 2021-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | European Physical Journal C: Particles and Fields |
| spelling | doaj.art-a204d0b5c7fc4d82b8eb777a04c6390d2022-12-21T23:19:31ZengSpringerOpenEuropean Physical Journal C: Particles and Fields1434-60441434-60522021-01-018111710.1140/epjc/s10052-021-08828-zA study of $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ polarization splitting by meson field in PICR hydrodynamic modelYilong Xie0Gang Chen1Laszlo Pal Csernai2School of Mathematics and Physics, China University of Geosciences (Wuhan)School of Mathematics and Physics, China University of Geosciences (Wuhan)Department of Physics and Technology, University of BergenAbstract With the PICR hydrodynamic model, we study the polarization splitting between $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ at RHIC BES energy range, based on the meson field mechanism. Our results fit to the experimental data fairly well. Besides, two unexpected effect emerges: (1) the baryon density gradient has non-trivial and negative contribution to the polarization splitting; (2) for 7.7 GeV Au+Au collisions within the centrality range of 20–50%, the polarization splitting surprisingly increases with the centrality decreases. The second effect might help to explain the significant signal of polarization splitting measured in STAR’s Au+Au 7.7 Gev collisions.https://doi.org/10.1140/epjc/s10052-021-08828-z |
| spellingShingle | Yilong Xie Gang Chen Laszlo Pal Csernai A study of $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ polarization splitting by meson field in PICR hydrodynamic model European Physical Journal C: Particles and Fields |
| title | A study of $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ polarization splitting by meson field in PICR hydrodynamic model |
| title_full | A study of $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ polarization splitting by meson field in PICR hydrodynamic model |
| title_fullStr | A study of $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ polarization splitting by meson field in PICR hydrodynamic model |
| title_full_unstemmed | A study of $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ polarization splitting by meson field in PICR hydrodynamic model |
| title_short | A study of $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ polarization splitting by meson field in PICR hydrodynamic model |
| title_sort | study of varlambda λ and bar varlambda λ ¯ polarization splitting by meson field in picr hydrodynamic model |
| url | https://doi.org/10.1140/epjc/s10052-021-08828-z |
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