In:
The European Physical Journal C, Springer Science and Business Media LLC, Vol. 81, No. 1 ( 2021-01)
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.
Type of Medium:
Online Resource
ISSN:
1434-6044
,
1434-6052
DOI:
10.1140/epjc/s10052-021-08828-z
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2021
detail.hit.zdb_id:
1397769-6
detail.hit.zdb_id:
1459069-4