Global Polarization of Ξ and ω Hyperons in Au+Au Collisions at sNN =200 GeV
National Science Foundation
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Physical Review Letters
Global polarization of Ξ and ω hyperons has been measured for the first time in Au+Au collisions at sNN=200 GeV. The measurements of the Ξ- and Ξ¯+ hyperon polarization have been performed by two independent methods, via analysis of the angular distribution of the daughter particles in the parity violating weak decay Ξ→Λ+π, as well as by measuring the polarization of the daughter Λ hyperon, polarized via polarization transfer from its parent. The polarization, obtained by combining the results from the two methods and averaged over Ξ- and Ξ¯+, is measured to be ⟨PΞ ©=0.47±0.10(stat)±0.23(syst)% for the collision centrality 20%-80%. The ⟨PΞ.
(2021). Global Polarization of Ξ and ω Hyperons in Au+Au Collisions at sNN =200 GeV. Physical Review Letters, 126(16),
Adam, J., et al.
"Global Polarization of Ξ and ω Hyperons in Au+Au Collisions at sNN =200 GeV." Physical Review Letters, vol. 126,no. 16, 2021,