Measurement of the Cross Section for Prompt Diphoton Production in pp̅ Collisions at √s =1.96 TeV

Authors

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

Date of this Version

7-8-2005

Comments

Published by American Physical Society. Phys. Rev. Lett. 95, 022003 (2005). . Copyright © 2005 American Physical Society. Permission to use.

Abstract

We report a measurement of the rate of prompt diphoton production in pp̅ collisions at √s =1.96 TeV using a data sample of 207 pb^-1 collected with the upgraded Collider Detector at Fermilab. The background from nonprompt sources is determined using a statistical method based on differences in the electromagnetic showers. The cross section is measured as a function of the diphoton mass, the transverse momentum of the diphoton system, and the azimuthal angle between the two photons and is found to be consistent with perturbative QCD predictions.