Measurement of the Inclusive Jet Cross Section inp¯pCollisions ats=1.8TeV

Inclusive jet production at $\sqrt{s}=1.8\mathrm{}$ TeV has been measured in the CDF detector at the Fermilab Tevatron $\overline{p}p$ Collider. Jets with transverse energies ($E_t$) up to 250 GeV have been observed. The $E_t$ dependence of the inclusive jet cross section is consistent with leading-order quantum-chromodynamic calculations, and comparison with lower-energy data shows deviations from scaling consistent with QCD. A lower limit of 700 GeV (95% confidence level) is placed on the quark compositeness scale parameter ${\Lambda }_c$ associated with an effective contact interaction.