2018 Impact factor 4.843
Particles and Fields


Eur. Phys. J. C 25, 361-377 (2002)
DOI: 10.1007/s10052-002-01031-x

A study of inclusive Double- ${\cal P}$omeron-Exchange in $p \bar{p}{\rightarrow} p X \bar{p}$ at $\sqrt{s} = 630$ GeV

The UA8 Collaboration A. Brandt1, S. Erhan1, A. Kuzucu1, M. Medinnis1, N. Ozdes1, P.E. Schlein1, M.T. Zeyrek1, J.G. Zweizig1, J.B. Cheze2 and J. Zsembery2

1  University of California, Los Angeles, CA 90024, USA
2  Centre d'Etudes Nucleaires-Saclay, 91191 Gif-sur-Yvette, France

(Received: 6 February 2002 / Published online: 30 August 2002 )

Abstract
We report measurements of the inclusive reaction, $p \bar{p}{\rightarrow} p X \bar{p}$, in events where either or both the beam-like final-state baryons were detected in Roman-pot spectrometers and the central system was detected in the UA2 calorimeter. A Double- $\rm {\cal P}$omeron-Exchange (DPE) analysis of these data and single diffractive data from the same experiment demonstrates that, for central masses of a few GeV, the extracted $\rm {\cal P}$omeron $\rm {\cal P}$omeron- $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron total cross section, $\sigma_{{\cal P}{\cal P}}^{tot}$, exhibits an enhancement which exceeds factorization expectations by an order-of-magnitude. This may be a signature for glueball production. The enhancement is shown to be independent of uncertainties connected with possible non-universality of the $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron flux factor. Based on our analysis, we present DPE cross section predictions, for unit (1 mb) $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron- $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron $\rm {\cal P}$omeron total cross section, at the Tevatron, LHC and the 920 GeV fixed-target experiment, HERA-B.



© Società Italiana di Fisica, Springer-Verlag 2002