High-p_T Jets in pbarp Collisions at sqrt{s} = 630 and 1800 GeV

TL;DR

This paper presents measurements of high-p_T jet production in proton-antiproton collisions at two energies, comparing results with QCD predictions and setting limits on quark compositeness models.

Contribution

It provides detailed experimental data on jet cross sections and angular distributions at Fermilab, validating QCD calculations and constraining new physics models.

Findings

Good agreement between data and next-to-leading-order QCD

Excluded quark compositeness contact interactions below 2.2 TeV

Measured jet cross sections and dijet spectra at two energies

Abstract

Results are presented from analyses of jet data produced in pbarp collisions at sqrt{s} = 630 and 1800 GeV collected with the DO detector during the 1994-95 Fermilab Tevatron Collider run. We discuss details of detector calibration, and jet selection criteria in measurements of various jet production cross sections at sqrt{s} = 630 and 1800 GeV. The inclusive jet cross sections, the dijet mass spectrum, the dijet angular distributions, and the ratio of inclusive jet cross sections at sqrt{s} = 630 and 1800 GeV are compared to next-to-leading-order QCD predictions. The order alpha_s^3 calculations are in good agreement with the data. We also use the data at sqrt{s} = 1800 GeV to rule out models of quark compositeness with a contact interaction scale less than 2.2 TeV at the 95% confidence level.