Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2006-05-26
J.Phys. G32 (2006) S557-S562
Physics
Nuclear Physics
Nuclear Experiment
Talk given at SQM 2006, International Conference on Strangeness in Quark Matter, March 26-31, 2006, Los Angeles CA; 4 pages, 2
Scientific paper
10.1088/0954-3899/32/12/S76
The system created in non central relativistic nucleus-nucleus collisions carries large angular orbital momentum. Due to spin-orbital coupling, produced particles could be globally polarized along the direction of the system angular momentum. We present results of a measurement of Lambda hyperon global polarization in Au+Au collisions at the center of mass energies 62 and 200 GeV with the STAR detector at RHIC. The observed global polarization of Lambda hyperons in the STAR acceptance is consistent with zero within the precision of the measurement. The obtained upper limit, |P_Lambda| < 0.01, is significantly below the theoretical values discussed recently in the literature.
for the STAR Collaboration
Selyuzhenkov Ilya
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