2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/197202We consider nonresonant contributions in the Dalitz plot analysis of B->rho pi->pi^+ pi^- pi^0 decay and their potential impact on the extraction of the CKM parameter alpha. In particular, we examine the role of the heavy mesons B^* and B_0, via the process B->pi (B^*, B_0)->pi^+ pi^- pi^0, and their interference with resonant contributions in the rho-mass region. We discuss the inherent uncertainties and suggest that the effects may be substantially smaller than previously indicated.15 pages, 3 figures; minor changes, version to appear in Phys. Rev. DHigh Energy Physics - PhenomenologyHigh Energy Physics - Experimenttext