Thursday, December 1, 2005, 16:00
OSGA/E6
D. Eversheim, Univ. Bonn
Abstract:
Parity violation in the N-N interaction provides a unique window on the
interplay between the weak and strong interaction between and within
hadrons. Up to intermediate energies of about 1 GeV the parity violation
in N-N interaction is mediated by the exchange of pi, rho, and omega
mesons. Though large enhancement factors of 10^5 have been observed in
heavy nuclei, the 6 weak nucleon-meson coupling constants that
parameterize the N-N interaction up to intermediate energies have to be
determined at the level of the basic effect i.e. 10^-7.
Although simple in principle, the experiments are technically very demanding in order to yield an overall error in the 10^-8 range. Aside from general considerations, I shall address past and present efforts to determine the weak nucleon-meson coupling constants.