Altas Energías

# Collisions at HADES, NICA and RHIC energies from the Core-Corona model

 Description The study of hyperons and their global polarization is a topic of great interest in the study of strongly interacting matter produced in heavy-ion collisions, because it, has been associated with the properties of this medium. In particular, It has been studied the possibility that the spin of hadrons be aligned along the global vorticity produced in semi-central collisions and this can be estimated in terms of global polarization. And that’s where the Λ and Λ-bar hyperons play an important role because of their easy identification and analysis through their charged decay. Recently experiments at different energy ranges such as HADES (High Ac- ceptance DiElectron Spectrometer), and BES (Beam Energy Scan), measured the global polarization of Λ and Λ-bar and so it has been observed that the global polarization increases as the energy of the collision decreases, being greater the effect for the Λ-bar. To describe this behavior, we have implemented the Core- Corona model, which assumes that in non-central heavy ion collisions, hyperons come from different density regions of the created system, and the relative abun- dance between one region and another influences global polarization, reaching a maximum at the available energies of the HADES and MPD (MultiPurpose Detector) experiment by NICA (Nuclotron-based Ion Collider fAcility). Liga Zoom; https://cuaed-unam.zoom.us/j/82622280628?pwd=MDg2NEtoZWNUaDJpMGhyRmh4MWwwQT09 Support Email: alexis@nucleares.unam.mx