Chiral Symmetry and Three-Nucleon Forces
Nuclear Theory
2008-11-26 v1
Abstract
After a brief review of the role three-nucleon forces play in the few-nucleon systems, the chiral-perturbation-theory approach to these forces is discussed. Construction of the (nominal) leading- and subleading-order Born terms and pion-rescattering graphs contributing to two-pion-exchange three-nucleon forces is reviewed, and comparisons are made of the types of such forces that are used today. It is demonstrated that the short-range -term of the Tucson-Melbourne force is unnatural in terms of power counting and should be dropped. The class of two-pion-exchange three-nucleon forces then becomes rather uniform.
Cite
@article{arxiv.nucl-th/9809065,
title = {Chiral Symmetry and Three-Nucleon Forces},
author = {J. L. Friar and D. Hüber and U. van Kolck},
journal= {arXiv preprint arXiv:nucl-th/9809065},
year = {2008}
}
Comments
14 pages, latex, 2 postscript figs. -- submitted to Phys. Rev. C -- epsfig.sty required