Inclusive Jet Cross Sections in $\bar{p}p$ Collisions at $\sqrt{s}$= 630 and 1800 GeV

TL;DR

This paper reports precise measurements of inclusive jet cross sections at Fermilab's Tevatron collider at two energies, comparing results with QCD predictions and exploring pseudorapidity dependence, providing insights into high-energy particle interactions.

Contribution

The study provides the first detailed measurement of the ratio of jet cross sections at different energies and compares these with theoretical predictions, highlighting areas of agreement and discrepancy.

Findings

Measured jet cross sections agree with NLO QCD at 1800 GeV.

Preliminary ratio measurement at 630 GeV differs from NLO QCD predictions.

Pseudorapidity dependence of jet production is analyzed.

Abstract

We have made a precise measurement of the inclusive jet cross section at $\sqrt{s}$=1800 GeV. The result is based on an integrated luminosity of 92 pb^{-1} collected at the Fermilab Tevatron $\bar{p}p$ Collider with the D\O detector. The measurement is reported as a function of jet transverse energy (60 GeV <= E_{T} < 550 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| <= 0.5). This preliminary measurement differs from NLO QCD predictions.