Diffractive Dijet Production at √s= 630 and 1800 GeV at the Fermilab Tevatron

Authors

Darin Acosta, University of FloridaFollow
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Collider Detector at Fermilab Collaboration

Date of this Version

4-15-2002

Comments

Published by American Physical Society. Phys. Rev. Lett. 88, 151802 (2002). http://prl.aps.org. Copyright © 2002 American Physical Society. Permission to use.

Abstract

We report a measurement of the diffractive structure function F_jj^D of the antiproton obtained from a study of dijet events produced in association with a leading antiproton in p̅p collisions at √s =630 GeV at the Fermilab Tevatron. The ratio of F_jj^D at √s =630 GeV to F_jj^D obtained from a similar measurement at √s =1800 GeV is compared with expectations from QCD factorization and other theoretical predictions. We also report a measurement of the ξ(x-Pomeron) and β(x of parton in Pomeron) dependence of F_jj^D at √s =1800 GeV. In the region 0.035 < ξ < 0.095, │t│< 1 GeV², and β< 0.5, F_jj^D (β, ξ) is found to be of the form β ^-1.0±0.1 ξ ^-0.90±0.1, which obeys β-ξ factorization.