A study of $$\varLambda $$ Λ and $$\bar{\varLambda }$$ Λ ¯ polarization splitting by meson field in PICR hydrodynamic model

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...

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Main Authors: Yilong Xie, Gang Chen, Laszlo Pal Csernai
Format: Article
Language:English
Published: SpringerOpen 2021-01-01
Series:European Physical Journal C: Particles and Fields
Online Access:https://doi.org/10.1140/epjc/s10052-021-08828-z
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spelling doaj-a204d0b5c7fc4d82b8eb777a04c6390d2021-01-17T12:53:11ZengSpringerOpenEuropean 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
collection DOAJ
language English
format Article
sources DOAJ
author Yilong Xie
Gang Chen
Laszlo Pal Csernai
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
author_facet Yilong Xie
Gang Chen
Laszlo Pal Csernai
author_sort Yilong Xie
title 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_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_sort study of $$\varlambda $$ λ and $$\bar{\varlambda }$$ λ ¯ polarization splitting by meson field in picr hydrodynamic model
publisher SpringerOpen
series European Physical Journal C: Particles and Fields
issn 1434-6044
1434-6052
publishDate 2021-01-01
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.
url https://doi.org/10.1140/epjc/s10052-021-08828-z
work_keys_str_mv AT yilongxie astudyofvarlambdalandbarvarlambdalpolarizationsplittingbymesonfieldinpicrhydrodynamicmodel
AT gangchen astudyofvarlambdalandbarvarlambdalpolarizationsplittingbymesonfieldinpicrhydrodynamicmodel
AT laszlopalcsernai astudyofvarlambdalandbarvarlambdalpolarizationsplittingbymesonfieldinpicrhydrodynamicmodel
AT yilongxie studyofvarlambdalandbarvarlambdalpolarizationsplittingbymesonfieldinpicrhydrodynamicmodel
AT gangchen studyofvarlambdalandbarvarlambdalpolarizationsplittingbymesonfieldinpicrhydrodynamicmodel
AT laszlopalcsernai studyofvarlambdalandbarvarlambdalpolarizationsplittingbymesonfieldinpicrhydrodynamicmodel
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