Global polarization measurement in Au+Au collisions

Y. Bai; F. Benedosso; M.A.J. Botje; O. Grebenyuk; A. Mischke; T. Peitzmann; M.J. Russcher; R.J.M. Snellings; N. van der Kolk

Global polarization measurement in Au+Au collisions

Y. Bai, F. Benedosso, M.A.J. Botje, O. Grebenyuk, A. Mischke, T. Peitzmann, M.J. Russcher, R.J.M. Snellings, N. van der Kolk

Research output: Contribution to journal › Article › Academic › peer-review

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 Λ̅ 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 Λ̅ hyperons in the STAR acceptance is consistent with zero within the precision of the measurements. The obtained upper limit, |PΛ,Λ̅ |⩽0.02, is compared with the theoretical values discussed recently in the literature

Original language	Undefined/Unknown
Pages (from-to)	024915/1-024915/10
Number of pages	10
Journal	Physical Review. C, Nuclear physics
Volume	76
Issue number	2
Publication status	Published - 2007

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Cite this

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title = "Global polarization measurement in Au+Au collisions",

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 Λ̅ 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 Λ̅ hyperons in the STAR acceptance is consistent with zero within the precision of the measurements. The obtained upper limit, |PΛ,Λ̅ |⩽0.02, is compared with the theoretical values discussed recently in the literature",

author = "Y. Bai and F. Benedosso and M.A.J. Botje and O. Grebenyuk and A. Mischke and T. Peitzmann and M.J. Russcher and R.J.M. Snellings and {van der Kolk}, N.",

note = "STAR Collaboration",

year = "2007",

language = "Undefined/Unknown",

volume = "76",

pages = "024915/1--024915/10",

journal = "Physical Review. C, Nuclear physics",

issn = "0556-2813",

publisher = "American Physical Society",

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TY - JOUR

T1 - Global polarization measurement in Au+Au collisions

AU - Bai, Y.

AU - Benedosso, F.

AU - Botje, M.A.J.

AU - Grebenyuk, O.

AU - Mischke, A.

AU - Peitzmann, T.

AU - Russcher, M.J.

AU - Snellings, R.J.M.

AU - van der Kolk, N.

N1 - STAR Collaboration

PY - 2007

Y1 - 2007

N2 - 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 Λ̅ 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 Λ̅ hyperons in the STAR acceptance is consistent with zero within the precision of the measurements. The obtained upper limit, |PΛ,Λ̅ |⩽0.02, is compared with the theoretical values discussed recently in the literature

AB - 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 Λ̅ 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 Λ̅ hyperons in the STAR acceptance is consistent with zero within the precision of the measurements. The obtained upper limit, |PΛ,Λ̅ |⩽0.02, is compared with the theoretical values discussed recently in the literature

M3 - Article

SN - 0556-2813

VL - 76

SP - 024915/1-024915/10

JO - Physical Review. C, Nuclear physics

JF - Physical Review. C, Nuclear physics

IS - 2

ER -