2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/23708Correlations between a composite boson and a fermion pair are considered in the context of the crossover theory of fermionic to bosonic superfluidity. It is shown that such correlations are the minimal ingredients needed in a many-body theory to generate the right boson-boson scattering length in the Bose-Einstein limit of the crossover.4 pages, no figuresSoft Condensed Mattertext