Determination of the strong coupling constant from the inclusive jet cross section in ppbar collisions at 1.96  TeV

D0 COLLABORATION, ..., R.PIEGAIA,

PHYSICAL REVIEW D - PARTICLE AND FILDS

American Physical Society

Año: 2009 vol. 80, p. 111107 - 111117

0556-2821

We determine the strong coupling constant αs and its energy dependence from the pT dependence of the inclusive jet cross section in pp̅ 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.