The strong coupling constant, αs, from W + jet processes: An analysis using Padé approximants

The recent results for R = σW+1jetσW+0jets obtained by the DØ Collaboration at Fermilab are reanalyzed. We use Padé Approximants (PA) to estimate the higher-order QCD corrections, which we find are on the order of 4%. We observed that using PA, we obtain the predictions of R increased by approximately 4%, independent of parton distribution functions used in the prediction, and are consistently lower by about one standard deviation compared to the experimental result. In addition, they are independent of the values of αs(Mz) used in the parton distribution function fits.