Date:
Tue, 17/12/201312:00-13:00
Location:
The Racah Institute moadon (pavilion 9)
"A tale of antiprotons and antineutrons":
Experimental results for the interaction of antiprotons with nuclei at very low energies (down to 1.5 MeV) will be reviewed together with optical-model analysis. Comparisons with extensive experiments on antiprotonic atoms reveal smooth connection between sub-threshold energies and the scattering regime. In particular there is no indication for a substantial isospin dependence. The same applies to antiprotonic hydrogen atoms and to antiproton-proton interactions up to momentum of 300 MeV/c.
In sharp contrast experimental results for antineutron-nucleus interactions which fit reasonably well into the above picture above 200 MeV/c, fail badly at lower momenta on basic tests implied by potential models. The same applies to antineutron-proton experimental results obtained with the same antineutron beam facility. New experiments might solve this puzzle.
Experimental results for the interaction of antiprotons with nuclei at very low energies (down to 1.5 MeV) will be reviewed together with optical-model analysis. Comparisons with extensive experiments on antiprotonic atoms reveal smooth connection between sub-threshold energies and the scattering regime. In particular there is no indication for a substantial isospin dependence. The same applies to antiprotonic hydrogen atoms and to antiproton-proton interactions up to momentum of 300 MeV/c.
In sharp contrast experimental results for antineutron-nucleus interactions which fit reasonably well into the above picture above 200 MeV/c, fail badly at lower momenta on basic tests implied by potential models. The same applies to antineutron-proton experimental results obtained with the same antineutron beam facility. New experiments might solve this puzzle.