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Fermilab
FERMILAB-Conf-02/086-E CDF May 2002
CDF Run 1 Diffractive Results
Kenichi Hatakeyamai 2
For the CDF Collaboration
The Rockefeller University
1230 York Avenue, New York, NY, 10021, U.S.A.
Abstract. Results on soft and hard diffraction obtained by the CDF Collaboration
in Run 1 of the Fermilab Tevatron pp collider are presented. Comparisons are made
with theoretical predictions and with results from the DESY ep collider HERA.
I INTRODUCTION
Diffractive events in pP collisions are generally characterized by a leading (an-
ti)proton and/or a rapidity gap, defined as a pseudorapidity3 region devoid of
particles (see Fig. 1).P
IP
PP
IP
PIP
IP
IP-
PiSD DD DPE
FIGURE 1. Illustrations of (left) single diffractive (SD), (middle) double diffractive (DD), and
(right) double pomeron exchange (DPE) events. The shaded areas represent regions of particle
production.
1 Email: hatake@physics.rockefeller.edu
2) LISHEP 2002 - Session C:Workshop On Diffractive Physics - February 4 - 8 2002 Rio de Janeiro
- RJ - Brazil
3) The pseudorapidity 0 is defined as r = - ln(tan 2), where 0 is the polar angle of a particle
with respect to the proton beam direction.
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Hakakeyama, K. CDF Run 1 diffractive results, article, May 29, 2002; Batavia, Illinois. (https://digital.library.unt.edu/ark:/67531/metadc737412/m1/1/: accessed March 28, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.