Energy response of ATLAS Tile Calorimeter to isolated muons

The ATLAS hadronic Tile Calorimeter is one of the sub-systems of the ATLAS detector installed at the LHC. The calorimeter is composed of alternating steel plates and plastic scintillating tiles. Our study aims to determine the uniformity of the energy response using isolated muons produced in the 𝑊 → 𝜇𝜈 decay process. The response of the individual TileCal cells is quantified by measuring the ratio of the energy deposited by a muon in a given cell (Δ𝐸) to the corresponding path length (Δ𝑥). To cancel out various systematic effects, the analysis uses the truncated mean of the Δ𝐸/Δ𝑥 distribution obtained from the experimental data divided by the same quantity from the Monte Carlo simulation samples. Results using 2022 and 2023 data are shown.