Inclusive jet cross section inp¯pcollisions at √s=1.8 TeV

We present a measurement of the inclusive jet cross section in p¯p collisions at √s =1.8 TeV at the Fermilab Tevatron using the Collider Detector at Fermilab. Good agreement is seen with the predictions of recent next-to-leading-order [O(${\mathrm{\alpha }}_{\mathit{s}}^3$)] QCD predictions. The dependence of the cross section on clustering cone size is reported for the first time. An improved limit on ${\mathrm{\Lambda }}_{\mathit{c}}$, a term characterizing possible quark substructure, is set at 1.4 TeV (95% C.L.).