Studies of the modeling of particle flow reconstruction for the CMS experiment

Accurate particle flow reconstruction is essential for data analysis at the CMS experiment, and must be regularly monitored to understand the relationship between detector conditions and the reconstructed physics objects. This study compares CMS data from Run 3 to Monte Carlo simulation to analyze detector performance and modeling. We study the modeling of particle flow reconstruction for different types of fundamental particles, and across different detector components. The stability of this modeling is studied across different data-taking periods, including with variations in the amount of pileup. Neutral hadrons are found to be poorly modeled in certain pseudorapidity regions, while pileup effects are found to be reasonably well modeled modeling. We discuss the performance of the modeling and prospects for improving the simulation of these effects.