Central Pseudorapidity Gaps in Events with a Leading Antiproton at the Fermilab Tevatron p̅p Collider

Authors

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

Date of this Version

7-4-2003

Comments

Published by American Physical Society. Phys. Rev. Lett. 91, 011802 (2003). http://prl.aps.org. Copyright © 2003 American Physical Society. Permission to use.

Abstract

We report a measurement of the fraction of events with a large pseudorapidity gap Δη within the pseudorapidity region available to the proton dissociation products X in p̅+p→p̅+X. For a final state p̅of fractional momentum loss ξ_p̅ and 4-momentum transfer squared t^p̅ within 0.06<ξ_p̅t^p̅|2 at √s=1800 [630] GeV, the fraction of events with Δη>3 is found to be 0.246±0.001 (stat)±0.042 (syst) [0.184±0.001 (stat)±0.043 (syst)]. Our results are compared with gap fractions measured in minimum bias p̅p collisions and with theoretical expectations.