EVIDENCE FOR A SUPER-HARD POMERON STRUCTURE

BRANDT A., ERHAN S., KUZUCU A., MEDINNIS M., OZDES N., SCHLEIN P., ...More

PHYSICS LETTERS B, vol.297, pp.417-424, 1992 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 297
  • Publication Date: 1992
  • Doi Number: 10.1016/0370-2693(92)91281-d
  • Journal Name: PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.417-424
  • Middle East Technical University Affiliated: Yes

Abstract

Results are presented from a study of jet production in ppBAR interactions with square-root s = 630 GeV at the CERN SppS-ColliderBAR, which are tagged by a proton or antiproton which possesses more than 90% of the incident beam momentum. The hard scattering which occurs between a parton in a beam particle and another in the soft residual component (pomeron-dominated) of the tagged proton allows the pomeron's partonic structure to be investigated. The observed jet distributions are in good agreement with expectations for hard parton-parton scattering in QCD. The pomeron exhibits a hard structure like 1 - x. However, there is an additional significant (30%) delta-function-like component, in which the entire momentum of the pomeron seems to participate in the hard scattering.