Erlangen 2026 – scientific programme
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T: Fachverband Teilchenphysik
T 3: Standard Model Physics I
T 3.4: Talk
Monday, March 16, 2026, 17:00–17:15, KH 00.014
Estimation of αs from dijet/Z+jet CMS data — •Johannes Gäßler — Schlossgartenstraße 52, 76327 Pfinztal, Germany
In a recent CMS analysis (Eur. Phys. J. C 85, 72 (2025)) the 2016 multidifferential dijet cross sections were published. This also included fits of the strong coupling constant and the proton structure to the data with results of αs = 0.1179 ± 0.0019 for the double-differential binning and αs = 0.1181 ± 0.0022 for the triple-differential binning respectively. I will present the results of a re-analysis of the data using complete NNLO predictions (taken from Phys.Rev.Lett. 135 (2025) 3, 031903) in comparison to the leading-color approximation employed previously. Moreover, I upgraded the xFitter package to the latest version, providing access to improved theory settings. I am extending the analysis to also include CMS Z+jet data with the ultimate goal of a combined fit using both datasets.