2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/51534We derive expressions for three-body phase space that are explicitly symmetrical in the masses of the three particles, by three separate methods.6 pages LaTex, 1 figure, to appear in Proceedings of the 15th Biennial Congress of the Australian Institute of Physics (Sydney, Australia, July 2002)High Energy Physics - Theorytext