N=4 supersymmetric 3-particles Calogero model

We constructed the most general N = 4 superconformal 3-particles systems with translation invariance. In the basis with decoupled center of mass the supercharges and Hamiltonian possess one arbitrary function which defines all potential terms. We have shown that with the proper choice of this function one may describe the standard, A(2) Calogero model as well as G(2) and BC2 Calogero models, which, by construction, possess N = 4 superconformal symmetry. The main property of all these systems is that even with the coupling constant equal to zero they still contain nontrivial interactions in the fermionic sector. In other words, there are infinitely many non-equivalent N = 4 supersymmetric extensions of the free action depending on one arbitrary function. We also considered quantization and explicitly showed how the supercharges and Hamiltonian are modified. In the quantum case the constructed systems exhibit only invariance with respect to N = 4 Poincare supersymmetry. (C) 2008 Elsevier B.V. All rights reserved.