Göttingen 2025 – scientific programme
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T: Fachverband Teilchenphysik
T 83: Methods in Particle Physics IV (Lepton Reconstruction)
T 83.2: Talk
Thursday, April 3, 2025, 16:30–16:45, VG 4.101
Likelihood Tuning for LHC Run 3 — •Max Fusté Costa1, Martina Laura Ojeda2, and Sarah Heim1 — 1DESY, Hamburg, Germany — 2CERN, Geneva, Switzerland
A likelihood-based identification (LH ID) is used to identify the reconstructed electrons in the ATLAS detector and to reject hadronic jets and electrons from heavy flavor decays. Due to differences between Run 2 and 3 at the LHC, the LH ID needs to be retuned. The transverse momentum range of the tuning will be extended as well. This is done using Run 3 Monte Carlo samples, with observables adjusted using the Shift and Stretch (S&S) method to match the data. The performance of the tuning and the fudging are evaluated through efficiency measurements.
Keywords: Likelihood; Run 3; Electron; Reconstruction