Hyperspherical Harmonics Method with Particle Excitation Degrees of Freedom

Abstract

We introduce a few extensions to the Hyperspherical Harmonics (HH) approach in order to include intrinsic excitations degrees of freedom. To this end we adapt the HH expansion method, usually built up starting from a fixed mass-weighted set of Jacobi coordinates, to the more general case where an arbitrary weighted set of coordinates is adopted. We provide a few results for 3- and 4-body bound state calculations.