###
Charlotte Elster

Ohio University, Athens
###
Three-Body Scattering at Intermediate Energies

An enormous effort has been made to understand and model the
nuclear force. Since the early 1990's realistic models of the nuclear
force are available, describing the
NN data with high accuracy. Especially during the last years
considerable progress has been made in deriving the nuclear force in the
context of effective field theories. The next step is to apply those
models in an environment where three (or four) nucleons interact with
each
other and thoroughly test underlying assumptions of nuclear physics.
Successes and failures in the description of three nucleon
scattering in the low energy regime will be illustrated in a few
examples, and an alternative approach to the conventional
state-of-the-art calculations, which
are carried out in an a partial wave truncated basis, will be
illustrated. As examples for this alternative formulation, which
is not limited by partial wave truncations,
elastic and break-up processes in the intermediate energy regime
involving scalar particles are given.
It can be expected that relativistic effects become important
for a description of scattering observables at intermediate
energies. An approach based on
Poincar{\'e} invariant quantum mechanics will employed to study
relativistic effects on elastic and break-up cross sections
in leading order of the Faddeev multiple scattering series.

Back to the theory seminar page.