Global polarization of Lambda hyperons in Au+Au collisions at sqrt{s_NN} = 200 
GeV

STAR Collaboration,; Adam, J.; Schmitz, N.; Seyboth, P.; et al.,

Local TagsRelease HistoryDetailsSummary

Global polarization of Lambda hyperons in Au+Au collisions at sqrt{s_NN} = 200 GeV

STAR Collaboration, Adam, J., Schmitz, N., Seyboth, P., & et al. (2018). Global polarization of Lambda hyperons in Au+Au collisions at sqrt{s_NN} = 200 GeV. Physical Review C, (98), 014910. Retrieved from https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2018-320.

Item is Released

show all hide all

Basic

show hide

Item Permalink: https://hdl.handle.net/21.11116/0000-0003-F90B-9 Version Permalink: https://hdl.handle.net/21.11116/0000-0003-F90C-8

Genre: Journal Article

Files

show Files

Locators

show

Creators

show

hide

Creators:
STAR Collaboration¹, Author
Adam, J.¹, Author
Schmitz, N.¹, Author
Seyboth, P.¹, Author
et al.¹, Author

Affiliations:
1Max Planck Institute for Physics, Max Planck Society and Cooperation Partners, ou_2253650

Content

show

hide

Free keywords: STAR

Abstract: Global polarization of $Λ$ hyperons has been measured to be of the order of a few tenths of a percent in Au+Au collisions at $\sqrt{s_{_{NN}}}$ = 200 GeV, with no significant difference between $Λ$ and $\barΛ$. These new results reveal the collision energy dependence of the global polarization together with the results previously observed at $\sqrt{s_{_{NN}}}$ = 7.7 -- 62.4 GeV and indicate noticeable vorticity of the medium created in non-central heavy-ion collisions at the highest RHIC collision energy. The signal is in rough quantitative agreement with the theoretical predictions from a hydrodynamic model and from the AMPT (A Multi-Phase Transport) model. The polarization is larger in more peripheral collisions, and depends weakly on the hyperon's transverse momentum and pseudorapidity $η^H$ within $|η^H|<1$. An indication of the polarization dependence on the event-by-event charge asymmetry is observed at the $2σ$ level, suggesting a possible contribution to the polarization from the axial current induced by the initial magnetic field.

Details

show

hide

Language(s):

Dates: Date issued: 2018

Publication Status: Issued

Pages: -

Publishing info: -

Table of Contents: -

Rev. Type: -

Identifiers: eDoc: 747417
URI: https://publications.mppmu.mpg.de/?action=search&mpi=MPP-2018-320
URI: http://arXiv.org/abs/arxiv:1805.04400
URI: https://inspirehep.net/search?p=find+eprint+1805.04400
Other: MPP-2018-320

Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show

hide

Title: Physical Review C

Alternative Title : Phys.Rev.C

Source Genre: Journal

Creator(s):

Affiliations:

Publ. Info: -

Pages: - Volume / Issue: (98) Sequence Number: - Start / End Page: 014910 Identifier: -