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

Johnson, Mark and Maître, Daniel (2018) 'Strong coupling constant extraction from high-multiplicity Z + jets observables.', Physical review D., 97 (5). 054013.


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 on 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 next-to-leading order extractions at hadron colliders. Our most conservative result for the strong coupling constant is α S ( M Z ) = 0.117 8 + 0.0051 − 0.0043 .

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Publisher statement:Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI. Funded by SCOAP3.
Date accepted:18 December 2017
Date deposited:05 April 2018
Date of first online publication:15 March 2018
Date first made open access:05 April 2018

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