Title:  The Ratio of Jet Cross Sections at sqrt{s}=630 GeV and 1800 GeV
Link to paper if available: Phys. Rev. Lett. 86, 2523 (2001) 
                            http://arxiv.org/abs/hep-ex/0008072
                            Submitted to PRD, 
                            http://arxiv.org/abs/hep-ex/0012046
Session of First Preference: Hard High Energy QCD and Structure Functions 
Session of Second Preference: Test of the Standard Model 
Session of Second Preference: Test of the Standard Model 

LP Session: QCD Phenomenology 

Abstract (max 1000 characters):

 
 The DZero Collaboration has measured the inclusive jet cross section
 in proton-antiproton collisions at sqrt{s} = 630 GeV. The results for
 pseudorapidities -0.5 to 0.5 are combined with our previous results
 at sqrt{s} = 1800 GeV to form a ratio of cross sections with smaller
 uncertainties than either individual measurement.
 Next-to-leading-order QCD predictions show excellent agreement with
 the measurement at 630 GeV; agreement is also satisfactory for the
 ratio. Specifically, despite a 10% to 15% difference in the absolute
 normalization, the dependence of the ratio on jet transverse momentum
 is very similar for data and theory.

Submitted:  9 April 2001