2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/200526Particle correlations are very actively studied in heavy-ion collisions at ultra-relativistic energies. Here, an attempt is made at determining a proper reference for such studies, by taking properly into account the multiparticle correlations induced by the conservation of total momentum in the collisions.9 pages, talk given at the workshop "High-pT physics at LHC", March 23-27, 2007, Jyvaskyla, Finland. v2: final versionNuclear Theorytext