Strong coupling constant extraction from high-multiplicity Z+jets observables

Abstract

We present a strong coupling constant extraction at Next-to-Leading Order QCD accuracy using ATLAS Z+2,3,4 jets data. This is the first extraction using processes with a dependency to high powers of the coupling constant. We obtain values of the strong coupling constant at the $Z$ mass compatible with the world average and with uncertainties commensurate with other NLO extractions at hadron colliders. Our most conservative result for the strong coupling constant is ${\alpha }_S=0.1178_{-0.0043}^{+0.0051}$.

Comments: 17 pages, 5 figures