Bing, O.
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).


Total cross-section of the p p ---> p p eta reaction near threshold

Bergdolt, A.M. ; Bergdolt, G. ; Bing, O. ; et al.
Phys.Rev.D 48 (1993) R2969-R2973, 1993.
Inspire Record 364575 DOI 10.17182/hepdata.22579

The pp→ppη reaction is studied at energies near the η production threshold. The total cross sections at nominal machine energies of 1260, 1265, and 1300 MeV are 90±15, 790±120, and 3460±690 nb, respectively. None of the existing perturbative model calculations reproduces the energy dependence, which deviates strongly from phase space. This suggests that the cross section is enhanced in the near vicinity of the production threshold by a large η−pp scattering length.

1 data table
Table 1

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