Title: The Ratio of Photon Cross Sections at sqrt{s}=630 GeV and 1800 GeV
Link to paper if available: http://arxiv.org/abs/hep-ex/0106026
Session of First Preference: Hard High Energy QCD and Structure Functions 
Session of Second Preference: Test of the Standard Model

LP Session: QCD Phenomenology 

Abstract:

The inclusive cross section for production of isolated photons has
been measured in pbarp collisions at sqrt{s} = 630 GeV with the DZero
detector at the Fermilab Tevatron Collider.  Results are presented for
photons with transverse energies from 7-49 GeV and with pseudorapidity
|eta| < 2.5.  This measurement is combined with our previous
measurement at sqrt{s} = 1800 GeV to form a ratio of the cross
sections.  Results for the 630 GeV cross section and for the ratio are
compared with next-to-leading order QCD and found to be in
satisfactory agreement.
                                                                               Submitted:  9 April 2001