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A Study of inclusive double pomeron exchange in p anti-p ---> p X anti-p at s**(1/2) = 630-GeV

The UA8 collaboration Brandt, A. ; Erhan, S. ; Kuzucu, A. ; et al.
Eur.Phys.J.C 25 (2002) 361-377, 2002.
Inspire Record 586770 DOI 10.17182/hepdata.43241

We report measurements of the inclusive reaction, p pbar -> p X pbar, 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-Pomeron-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 Pomeron-Pomeron total cross section 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 Pomeron flux factor. Based on our analysis, we present DPE cross section predictions, for unit (1 mb) Pomeron-Pomeron total cross section, at the Tevatron, LHC and the 920 GeV fixed-target experiment, HERA-B.

2 data tables
Table 1

The corrected differential cross section as a function of the mass of the central system X for the 'AND' and 'OR' data sets.

Table 2

Mass dependence of the Pomeron-Pomeron total cross section derived from the'AND' and 'OR' data sets.