Polarization of Λ hyperons and their antiparticles is calculated in a 3 +1 dimensional viscous hydrodynamic model with initial state from UrQMD hadron/ string cascade. We find that, along with recent results from STAR, the mean polarization at fixed centrality decreases as a function of collision energy from 1.5% at√sNN=7. 7 GeV to 0.2% at√sNN=200 GeV. We explore the effects which lead to such collision energy dependence, feed-down corrections and a difference between Λ and ̄Λ.
Vorticity in the QGP liquid and Lambda polarization at the RHIC Beam Energy Scan / Karpenko, Iurii; Becattini, Francesco. - In: NUCLEAR PHYSICS. A. - ISSN 0375-9474. - ELETTRONICO. - 967:(2017), pp. 764-767. (Intervento presentato al convegno Quark Matter) [10.1016/j.nuclphysa.2017.05.057].
Vorticity in the QGP liquid and Lambda polarization at the RHIC Beam Energy Scan
Becattini, Francesco
2017
Abstract
Polarization of Λ hyperons and their antiparticles is calculated in a 3 +1 dimensional viscous hydrodynamic model with initial state from UrQMD hadron/ string cascade. We find that, along with recent results from STAR, the mean polarization at fixed centrality decreases as a function of collision energy from 1.5% at√sNN=7. 7 GeV to 0.2% at√sNN=200 GeV. We explore the effects which lead to such collision energy dependence, feed-down corrections and a difference between Λ and ̄Λ.
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