The last decade has witnessed great experimental progress that has led to measurements of
near-threshold cross sections—polarized as well as unpolarized—of high accuracy for …

A review of the present understanding of η′ and η meson physics and these mesons as a
probe of gluon dynamics in low-energy QCD is presented. Recent highlights include the …

The pp→ ppη reaction has been measured at six energies close to threshold, from 1258
MeV to 1352 MeV, using an internal cluster gas jet target in the CELSIUS storage ring. The η …

The quasifree p+ n→ d+ η reaction cross section has been measured in the near-threshold
region using deuterium from an internal cluster-jet target and 1350 MeV protons in the …

The total cross section of the pp→ ppη 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 …

The total cross section of the pp→ pp η′ reaction has been measured at two energies near
threshold by detecting the final protons in a magnetic spectrometer. The values obtained are …

The exclusive production cross sections for ω and φ mesons have been measured in proton-
proton reactions at p lab= 3.67 GeV/c. The observed φ/ω cross section ratio is (3.8±0.2− 0.9+ …

The first measurement of the cross section of the quasifree pn→ pn η reaction has been
carried out at the CELSIUS storage ring using a deuterium internal cluster jet target. The …

The production of η and η′ mesons in photon-and hadron-induced reactions on free and
quasi-free nucleons and on nuclei is reviewed. The extensive database on γ N→ η N, for …

Total cross sections for the pp→ ppη′ reaction have been measured in the excess energy
range from Q= 1.53 MeV to Q= 23.64 MeV. The experiment has been performed at the …