Global Polarization of Lambda Hyperons in the MPD Experiment at NICA Energies

Abstract The spin polarization of lambda hyperons exhibits an anisotropic alignment with the total orbital angular momentum of the collision system, serving as a probe for vorticity in the strongly interacting matter. We study the lambda hyperon decay into proton-pion pair to measure global polarization in heavy-ion collisions, adopting an approach previously used by the STAR Collaboration to investigate the vortical structure of the produced medium. This method is now applied to Xe + Xe collisions at a center-of-mass energy of 2.87 GeV per nucleon pair, generated with the UrQMD model. The results provide a baseline for future experimental measurements with the MPD detector.