Design and optimization of a MPGD-based hadronic calorimeter for a future Muon Collider.

A Multi-TeV Muon Collider currently represents the ideal machine to measure the Higgs properties with extremely high precision and, possibly, to investigate for new physics. Much effort is needed in order to carefully design the most suitable detector system for the Muon Collider experiment, with the aim of mitigating the intense machine background induced by the decay of beam muons (BIB). For the first time, an innovative MPGD-based hadronic calorimeter is designed specifically for the Muon Collider environment with the aim to maximize the efficiency of the Particle Flow reconstruction of charged hadrons, neutral hadrons and jets. The detector consists of a sampling calorimeter exploiting MPGDs as active layers: they offer a fast and robust technology for high-radiation environments, and a high granularity for precise spatial measurements. The decays of $H$ and $Z$ bosons in jets are chosen as a benchmark for this study. Full simulations including the BIB are carried out in order to measure the jet reconstruction performance with Particle Flow algorithm and to quantify the impact of the proposed design. The detector design and the results from simulation studies will be presented.