Speaker
Hideko Nagahiro
(Nara Women's University)
Description
In this talk, we shed light upon the mass of the eta' in nuclear matter in the context of partial restoration of chiral symmetry, pointing out that the U_A(1) anomaly effects causes the mass difference of eta'-eta necessarily through the chiral symmetry breaking. As a consequence, the mass of the eta' is expected to be reduced by order of 100 MeV in nuclear matter. We propose several reactions for the formation of the eta'-meson bound states and discuss the experimental feasibilities.
