3 years ago

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

Daniel Maître, Mark Johnson

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 $\alpha_S=0.1178 ^{+0.0051}_{- 0.0043}$.

Publisher URL: http://arxiv.org/abs/1711.01408

DOI: arXiv:1711.01408v1

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