2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/82742In the frame of the Wigner function formalism, we derive a coalescence model to use with a hydrodynamical picture of the reaction zoneTo appear in "GSI Yearly Reports 96", 1 page Latex, needs style-file "gsirep.sty"Nuclear Theory(Anti-) Deuteron Coalescence in Ultrarelativistic Heavy Ion Collisionstext