Measurement of the Strong Coupling Constant from Inclusive Jet Production at the Tevatron p̅p Collider

Authors

T. Affolder, Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, California
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Collider Detector at Fermilab Collaboration

Date of this Version

1-28-2002

Comments

Published by American Physical Society. Phys. Rev. Lett. 88, 042001 (2002). http://prl.aps.org. Copyright © 2002 American Physical Society. Permission to use.

Abstract

We report a measurement of the strong coupling constant, α_s(M_z ), extracted from inclusive jet production in pp̅ collisions at √s =1800 GeV. The QCD prediction for the evolution of α_s with jet transverse energy E_T is tested over the range 40 TE_T for the renormalization scale. The data show good agreement with QCD in the region below 250 GeV. The value of α_s at the mass of the Z⁰ boson averaged over the range 40 < T < 250 GeV is found to be α_s(M_z )= 0.1178 ± 0.0001(stat)_-0.0095^+0.0081 (expt. syst). The associated theoretical uncertainties are mainly due to the choice of renormalization scale (_-4%^+6%) and input parton distribution functions (5%).