An analytically solvable three-body break-up model problem in hyperspherical coordinates L.U. Ancarani, G. Gasaneo and D.M. Mitnik Eur. Phys. J. D, 66 10 (2012) 270 Published online: 25 October 2012 DOI: 10.1140/epjd/e2012-30353-4