Research Papers in Physics and Astronomy


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Published in PHYSICAL REVIEW D 80, 111107(R) (2009). Copyright © 2009 The American Physical Society. Used by permission.


We determine the strong coupling constant αs and its energy dependence from the pT dependence of the inclusive jet cross section in pp collisions at √s= 1.96 TeV. The strong coupling constant is determined over the transverse momentum range 50<pT < 145 GeV. Using perturbative QCD calculations to order O(αs3) combined with O(αs4) contributions from threshold corrections, we obtain αs(MZ) =0.1161-0.0048+0.0041. This is the most precise result obtained at a hadron-hadron collider.

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