Characterization of muon deep inelastic scattering events in the SND@LHC experiment Monte Carlo simulation

Scattering and Neutrino Detector at the Large Hadron Collider (SND@LHC) is a compact, stand-alone experiment located in the TI18 tunnel (480 m downstream of the ATLAS interaction point) to perform measurements with high-energy neutrinos up to the TeV scale produced at LHC in the pseudorapidity region 7.2 < η < 8.4. The experimental environment is subject to an intense flux of high energy muons, which can interact in the detector material. In particular, muon deep inelastic scattering represents one of the main background sources, as it can mimic the signatures of muon neutrino charged-current interactions. This thesis focuses on the characterization of muon deep inelastic scattering background using Monte Carlo simulations. A comparative study of various simulated samples was performed to evaluate the impact of the evolution of the simulation chain on the modelling of deep inelastic scattering events. Improvements in the the simulation with the latest geometry, including the implementation of a Monte Carlo Event Builder, enabled a preliminary comparison between the simulated events and data for a background evaluation in support of the ongoing muon neutrino charged-current analysis on 2024 data.