# SEMINAR

Three-Body Scattering at Intermediate Energies
*Dr. Charlotte Elster*
(**Ohio University**)

**Sala P7, IST, Edifício Pós-Graduação**

**Tuesday, March 22nd, 2005 at 04:00 PM**

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**Abstract**
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An enormous effort has been made to understand and model the
nuclear force. Since the early 1990'ies 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 and failures in the description of three nucleon scattering in the low energy regime will be llustrated 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. Special emphasis is placed on a study of the convergence of the multiple scattering series as function of energy when considering different observables.
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