arXiv:nucl-th/9904060·v1·Nuclear Theory
The c-term of the TM 3-body Force: to be or not to be
H. Kamada (1,2)🇩🇪 · D. Hueber (1,3)🇩🇪 · A. Nogga (1) ((1) Institut fuer Theoretische Physik II, Ruhr-Universitaet Bochum, Bochum, Germany (2) Institut fuer Strahlen- und Kernphysik der Universitaeat Bonn, Bonn, Germany (3) Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico, USA)🇩🇪
Abstract
In Faddeev calculations of ^3Hwe study the dependence of the binding on the three nucleon force. We adopt the 2 pi -exchange Tucson-Melbourne three-nucleon force and investigate phenomenologically the dependence on the strength of the individual three-body force operators (a -, b -, c - and d -terms). While the a -term provides a tiny contribution the b - and d -terms provides a tiny contribution the b - and d -terms are important to gain the experimental binding energy. We find two solutions for the c -term, one around the value used in the Tucson-Melbourne model and a new one close to zero, which supports the recentrecommendation of chiral perturbation theory that the short-range c -term should be dropped.
Comments: 12 pages (3 figures)