How To Classify 3-Body Forces -- And Why

Abstract

For systems with only short-range forces and shallow 2-body bound states, the typical strength of any 3-body force in all partial-waves, including external currents, is systematically estimated by renormalisation-group arguments in the Effective Field Theory of Point-Like Interactions. The underlying principle and some consequences in particular in Nuclear Physics are discussed.

Comments: 7 pages LaTeX2e using FBSart-class (provided); 2 figures in 3 .eps files included using graphicx; to appear in Few-Body Systems