Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2001-08-17
Phys.Rev.Lett.88:042001,2002
Physics
High Energy Physics
High Energy Physics - Experiment
7 pages, 3 figures, using RevTeX. Submitted to Physical Review Letters
Scientific paper
10.1103/PhysRevLett.88.042001
We report a measurement of the strong coupling constant, $\alpha_s(M_Z)$, extracted from inclusive jet production in $p\bar{p}$ collisions at $\sqrt{s}=$1800 GeV. The QCD prediction for the evolution of $\alpha_s$ with jet transverse energy $E_T$ is tested over the range 40<$E_T$<450 GeV using $E_T$ for the renormalization scale. The data show good agreement with QCD in the region below 250 GeV. In the text we discuss the data-theory comparison in the region from 250 to 450 GeV. The value of $\alpha_s$ at the mass of the $Z^0$ boson averaged over the range 40<$E_T$<250 GeV is found to be $\alpha_s(M_{Z})= 0.1178 \pm 0.0001{(\rm stat)}^{+0.0081}_{-0.0095}{\rm (exp. syst)}$. The associated theoretical uncertainties are mainly due to the choice of renormalization scale ($^{+6%}_{-4%}$) and input parton distribution functions (5%).
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