Rapidity dependence of global polarization in heavy ion collisions * *ZTL and QW are supported in part by the National Natural Science Foundation of China (NSFC) (11890713, 11535012). JS is supported in part by Shandong Province Natural Science Foundation (ZR2019YQ06)

Abstract

We use a geometric model for hadron polarization in heavy ion collisions with an emphasis on the rapidity dependence. The model is based on the model of Brodsky, Gunion, and Kuhn, as well as the Bjorken scaling model. We make predictions regarding the rapidity dependence of global polarization in the collision energy range of 7.7-200 GeV by assuming the rapidity dependence of two parameters, and . The predictions can be tested by future beam-energy-scan experiments at the Relativistic Heavy Ion Collider of Brookhaven National Lab.