Renormalisation-group analysis of repulsive three-body systems

Details Renormalisation-group analysis of repulsive three-body systems Renormalisation-group analysis of repulsive three-body systems

2005-09-14

arxiv.org/abs/nucl-th/0509031v1

J.Phys. A39 (2006) L49-L54

Physics

Nuclear Physics

Nuclear Theory

5 pages, RevTeX

Scientific paper

10.1088/0305-4470/39/2/L01

A coordinate space approach, based on that used by Efimov, is applied to three-body systems with contact interactions between pairs of particles. In systems with nonzero orbital angular momentum or with asymmetric spatial wave functions, the hyperradial equation contains a repulsive 1/r^2 potential. The resulting wave functions are used in a renormalisation group analysis. This confirms Griesshammer's power counting for short-range three-body forces in these systems. The only exceptions are ones like the 4S channel for three nucleons, where any derivatives needed in the interaction are found to be already counted by the scaling with the cut-off.

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