Inclusive Jet Cross Sections in pbarp Collisions at 630 and 1800 GeV

TL;DR

This paper reports a precise measurement of inclusive jet cross sections at 1800 GeV in proton-antiproton collisions, comparing results with QCD predictions and exploring energy dependence at Fermilab's Tevatron.

Contribution

It provides the first detailed measurement of jet cross sections at 1800 GeV and compares these with NLO QCD, including a preliminary ratio measurement at different energies.

Findings

Results agree with NLO QCD predictions for cross sections.

Preliminary ratio measurement at 630 and 1800 GeV differs from theoretical expectations.

The study extends jet measurements to higher energies and pseudorapidities.

Abstract

We have made a precise measurement of the inclusive jet cross section at 1800 GeV. The result is based on an integrated luminosity of 92 pb**-1 collected at the Fermilab Tevatron pbarp Collider with the DO detector. The measurement is reported as a function of jet transverse energy (60 GeV < ET < 500 GeV), and in the pseudorapidity intervals |eta|<0.5 and 0.1<eta<0.7. A preliminary measurement of the pseudorapidity dependence of inclusive jet production (eta<1.5) is also discussed. The results are in good agreement with predictions from next-to-leading order (NLO) quantum chromodynamics (QCD). D\O has also determined the ratio of jet cross sections at $\sqrt{s}$=630 GeV and $\sqrt{s}$=1800 GeV ($|\eta|\leq 0.5$). This preliminary measurement differs from NLO QCD predictions.