P P --> P P ETA
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Comparison of eta and eta' production in the p p --> p p eta (eta') reactions near threshold.

Hibou, F. ; Bing, O. ; Boivin, M. ; et al.
Phys.Lett.B 438 (1998) 41-46, 1998.
Inspire Record 466930 DOI 10.17182/hepdata.28154

The total cross section of the pp -> pp eta' reaction has been measured at two energies near threshold by detecting the final protons in a magnetic spectrometer. The values obtained are about a factor of 70 less than for the corresponding eta production, in good agreement with the predictions of a one-pion-exchange model.

2 data tables
Table 1

Axis error includes +- 10/10 contribution (Overall normalization error already included).

Table 2

Axis error includes +- 10/10 contribution (Overall normalization error already included).


Measurement of the p p ---> p p eta total cross-section between 1.265-GeV and 1.5-GeV

Chiavassa, E. ; Dellacasa, G. ; De Marco, N. ; et al.
Phys.Lett.B 322 (1994) 270-274, 1994.
Inspire Record 376677 DOI 10.17182/hepdata.28768

The total cross section of the pp→ pp η reaction has been measured at incident proton energies of 1.265, 1.3, 1.4 and 1.5 GeV by detecting the two photons from the η decay in the PINOT spectrometer. The data are compared with other near-threshold measurements and with the predictions of existing theoretical calculations.

1 data table
Table 1

Value given at 1263 MeV assumes energy 2 MeV lower than nominal value. This uncertainty only affects this lowest energy point.