|Author||Bach, G. G.|
|Source||United States Department of Energy Office of Scientific and Technical Information|
|Subject Keyword||PHYSICS AND MATHEMATICS ♦ COUPLING ♦ HYPERFRAGMENTS ♦ INTERACTIONS ♦ MANY BODY PROBLEM ♦ NUCLEAR MODELS ♦ NUCLEAR THEORY ♦ NUCLEONS ♦ PERTURBATION THEORY ♦ TRITONS|
|Abstract||A investigation is made to ascertain the relative importance of the two- body and three-body A-nucleon potentials which have the same order of coupling constant. The three-body potential, which is derived using perturbation theory tom a pseudoscalar interaction, is found to be weakly singular and hence much smaller than the two-body potential. In addition, the largest terms are noncentral. In the hypertriton, where correlations are large, it is found that three-bedy forces are repulsive for S states and may amount to 4%. Suitable D state admixture could lead to a repulsive three-body force of nearly 6%. In heavy hypernuclei, the relattve importance of three-body forces is about 1/2% if correlations are neglected, and may be as large as 7 1/2% if correlations are as strong as they are in the hypertriton. It is also found tbat by omitting the Feynman graphs with bare lines the three-body contributions are negligible. (auth)|
|Learning Resource Type||Article|
|Publisher Department||Univ. of Rome|
|Organization||Univ. of Rome|
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