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 …

Studies of meson production at threshold in the hadron-hadron interaction began in the
fifties when sufficient energies of accelerated protons were available. A strong …

Production of p-wave pions in nucleon-nucleon collisions is studied according to an
improved power counting that embodies the constraints of chiral symmetry. Contributions …

Extensive kinematically complete measurements of the pp→ pp π 0 reaction have been
made at six beam energies: 310, 320, 340, 360, 400, and 425 MeV. Angles and energies of …

In a kinematically complete experiment we have measured the two analyzing powers and
the five spin correlation coefficients of the reaction p→ p→→ pp π 0 as a function of all five …

We investigate p-wave pion production in nucleon-nucleon collisions up to next-to-next-to-
leading order in chiral effective field theory. In particular, we show that it is possible to …

Measurements of the η meson production with a polarised proton beam in the reaction p→
p→ ppη have been carried out at an excess energy of Q= 40 MeV. The dependence of the …

In this review, we present the recent advances for calculations of the reactions NN→ NNπ
using chiral effective field theory χEFT. Discussed are the next-to-next-to leading order …

It is demonstrated within the dibaryon-induced model for NN interaction that pp scattering in
P waves is governed mainly by the production of the intermediate dibaryon resonances. Two …

The differential cross section dσ/dΩ and analysing power Ay of the p→ p→{pp} sπ0 reaction
have been measured at COSY-ANKE at 353 MeV. The final proton pair was detected at very …