Measurement of the Ratio of b Quark Production Cross Sections in Antiproton-Proton Collisions at 630 GeV and 1800 GeV

TL;DR

This paper measures the ratio of bottom quark production cross sections at two different energies in antiproton-proton collisions, confirming consistency with NLO QCD predictions.

Contribution

It provides the first precise measurement of the cross section ratio at 630 GeV and 1800 GeV, validating QCD calculations at these energies.

Findings

Measured ratio sigma(630)/sigma(1800) = 0.171 +/- 0.024 +/- 0.012

Results agree with next-to-leading order QCD predictions

Supports QCD models of bottom quark production in hadron collisions.

Abstract

We report a measurement of the ratio of the bottom quark production cross section in antiproton-proton collisions at 630 GeV to 1800 GeV using bottom quarks with transverse momenta greater than 10.75 GeV identified through their semileptonic decays and long lifetimes. The measured ratio sigma(630)/sigma(1800) = 0.171 +/- .024 +/- .012 is in good agreement with next-to-leading order (NLO) quantum chromodynamics (QCD).