Global polarization measurement in Au+Au collisions

B. I. Abelev et al. (STAR Collaboration)
Phys. Rev. C 76, 024915 – Published 29 August 2007; Erratum Phys. Rev. C 95, 039906 (2017)

Abstract

The system created in noncentral relativistic nucleus-nucleus collisions possesses large orbital angular momentum. Because of spin-orbit coupling, particles produced in such a system could become globally polarized along the direction of the system angular momentum. We present the results of Λ and Λ¯ hyperon global polarization measurements in Au+Au collisions at sNN=62.4 and 200 GeV performed with the STAR detector at the BNL Relativistic Heavy Ion Collider (RHIC). The observed global polarization of Λ and Λ¯ hyperons in the STAR acceptance is consistent with zero within the precision of the measurements. The obtained upper limit, |PΛ,Λ¯|0.02, is compared with the theoretical values discussed recently in the literature.

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  • Received 11 May 2007

DOI:https://doi.org/10.1103/PhysRevC.76.024915

©2007 American Physical Society

Erratum

Erratum: Global polarization measurement in Au + Au collisions [Phys. Rev. C 76, 024915 (2007)]

B. I. Abelev et al. (STAR Collaboration)
Phys. Rev. C 95, 039906 (2017)

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Vol. 76, Iss. 2 — August 2007

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