π 0/γ identification with the FCC-ee LAr ECAL

The FCC-ee is a lepton collider that will operate in a 100 km circular tunnel and will consist in the first phase of the FCC integrated program proposed as the post-LHC CERN flagship experiment. Several aspects of the FCC-ee physics program rely on strong particle identification capabilities among which single photon and neutral pion originated electromagnetic shower separation is of utmost importance. This document reports on the π 0/γ separation performance of the Noble Liquid electromagnetic calorimeter proposed for FCC-ee. Different detector geometries and machine learning approaches are investigated. A neutral pion mis-identification probability of 10% for a 95% photon efficiency working point is achieved with a regular geometry and a Hybrid Neural Network approach.