Karlsruhe 2024 – scientific programme
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T: Fachverband Teilchenphysik
T 126: Top physics 5 (top mass)
T 126.2: Talk
Friday, March 8, 2024, 09:15–09:30, Geb. 30.95: Audimax
Measurement of the top quark mass with the template method in the tt → lepton + jets channel using the full Run 2 dataset in ATLAS — •Dimbiniaina Rafanoharana1 and Andrea Knue2 — 1Albert-Ludwigs-Universität Freiburg — 2TU Dortmund
The top-quark mass is a free parameter of the Standard Model (SM) and is playing a key role in the test of the consistency of the SM. Its precise determination is therefore of paramount importance. Several measurements of the top-quark mass in different final states using various methods were performed at the Tevatron and the Large Hadron Collider.
The combined measurement of the top-quark mass using fifteen measurements performed by ATLAS and CMS at Run 1 achieved a precision of 2 per mill. The combination is limited by the systematic effect as the relative statistical and systematic uncertainties are 0.8 per mill and 1.7 per mill, respectively.
The measurement of the top-quark mass with the template method in the tt → lepton + jets channel using the full Run 2 dataset in ATLAS will be shown. Given the large amount of data collected during Run 2, the measurement is limited by systematic effects. The investigation of various methods aimed at reducing the dominant systematic uncertainty on the top-quark mass will be presented, where the latest ATLAS uncertainty prescriptions are used.
Keywords: Top-quark; Top-quark mass