SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 135: Top Mass, Top BSM

T 135.1: Vortrag

Donnerstag, 23. März 2023, 17:30–17:45, HSZ/0201

Measurement of the top-quark mass in the tt → lepton + jets channel with a template method, using the full Run 2 dataset in ATLAS — •Dimbiniaina Rafanoharana and Andrea Knue for the ATLAS collaboration — Albert-Ludwigs-Universität Freiburg

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 different ATLAS Run 1 measurements achieved a relative overall uncertainty of 0.28%. The combination is limited by the systematic uncertainty as the relative statistical and systematic uncertainties are 0.14% and 0.23%, 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 mainly limited by systematic effects. The presentation will discuss the dominating systematic uncertainties and studies aimed at reducing those uncertainties in the top-quark mass.