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T: Fachverband Teilchenphysik
T 31: Methods in particle physics 3 (lepton reconstruction)
T 31.5: Talk
Tuesday, March 5, 2024, 17:00–17:15, Geb. 20.30: 2.066
Muon reconstruction and identification efficiency in ATLAS with run-3 pp collision data — •giorgia proto and davide Cieri — Max Planck Institute Fur Physik
The identification and precise measurement of processes with muons in the final state is one of the main goal of the ATLAS experiment at the LHC and HL-LHC. Muons are produced in many important physics processes and are detected by the Muon Spectrometer with almost 100%-efficiency and good momentum resolution. Muon reconstruction and identification efficiencies are measured using the tag-and-probe method using Z → µ µ sample in the bulk of the space-phase. In the low-pT region, the same method is applied on J/Ψ → µ µ sample.
The measured efficiency in Monte Carlo (MC) samples is then compared with that obtained from dataset. The agreement between the efficiency measured in data and the corresponding efficiency in MC is called Scale Factor and is used to quantify the deviation of the simulation from the real detector behaviour and is then used to correct the simulation in physics analyses.
This presentation reports the muon reconstruction and identification efficiency and the relative scale factors measurements in ATLAS during the Run 3 data taking for pp collisions at √s = 13.6 TeV collected in 2022 and 2023.
Keywords: Muon Combined performance; Muon Efficiency