Preview of the general laboratory seminar “Study of elastic NN interactions using polarized beams and target at ANKE–COSY” by Sergey Dymov, 30.01.2019
ANKE measurements of the cross section, vector analyzing powers, and spin correlation coefficients in the reaction dp → {pp}s n, where the pair {pp}s is in the 1S0 state, gave information on charge exchange amplitudes of the small-angle neutron–proton scattering. The COSY–EDDA experiments on the elastic pp scattering provided the main data array for the partial wave analysis above 1 GeV, and the ANKE experiments complemented those data with measurements at small angles inaccessible at EDDA. The differential cross section and the analyzing power were obtained at angles 5º < Θcm< 30º in the energy range of 0.8 to 2.8 GeV.
Elastic pn scattering is studied much more poorly than pp scattering, especially at energies above 1.5 GeV. Analyzing power in elastic proton–deuteron and quasi-elastic proton–neutron scattering at small angles was measured using a polarized proton beam and a deuterium target at 796 MeV and five energies from the range of 1600–2400 MeV.
The ANKE experimental programme and new results on pd and pn scattering were reviewed.