2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/81929We study the scattering of a particle from a bound pair in an effective field theory using a distorted-wave renormalisation group method to find the power-counting for the three-body force terms. We find that three-body terms appear at lower orders than naively expected. They start with a marginal term that varies as a logarithm rather than a power of the energy scales in the problem. The marginal term has important implications for the three-body problem in nuclear physics.4 pages. Talk given at the 18th European Conference on Few-Body Problems in Physics, Bled, Slovenia, 8-14 September, 2002Nuclear Theorytext