Volume 365 - alphas-2019: Workshop on precision measurements of the QCD coupling constant (ALPHAS2019) - $a_S$ from DIS & PDFs
$a_S$ from H1 jets
D. Britzger*  on behalf of the H1 and NNLOJET Collaboration
*: corresponding author
Full text: pdf
Pre-published on: July 22, 2019
Published on: September 13, 2019
Abstract
The value of αs(mZ)is determined from inclusive jet and di-jet cross sections in neutral-currentdeep-inelastic ep scattering (DIS) measured at HERA by the H1 collaboration using next-to-next-to-leading order (NNLO) perturbative QCD predictions. Using inclusive jet and di-jet data together, the strong coupling constant is determined to be αs(mZ) =0.1157(20)exp(29)th. Complementary, αs(mZ)is determined together with parton distribution functions of the proton (PDFs)from jet and inclusive DIS data and the value is determined to be αs(mZ) =0.1142(28)tot. Both results are found to be consistent. The running of the strong coupling is tested at different values of the renormalisation scale and the results are found to be in agreement with expectations.
DOI: https://doi.org/10.22323/1.365.0017
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