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

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

Measurement of the ratio of<i>b</i>quark production cross sections in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>p</mml:mi></mml:mrow><mml:mrow><mml:mi>¯</mml:mi></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mi>p</mml:mi></mml:math>collisions at<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:msqrt><mml:mrow><mml:mi>s</mml:mi></mml:mrow></mml:msqrt><mml:mo>=</mml:mo><mml:mn>630</mml:…

Measurement of the ratio ofbquark production cross sections inp¯pcollisions ats=630