2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37728We present measurements related to the CKM angle beta from BABAR based on 82 or ~115 fb-1 data samples collected at the PEP-II e+e- asymmetric B Factory collider. A new method allowing to measure the sign of cos(2.beta) with B0->J/Psi"K*0" events is explained and related results reported. Recent CP measurements in the penguin dominated modes B0->phi K0,B0->K+K-K0s, B0->pi0 K0s and B0->f0(980) K0s are presented.8 pages, 13 postscript figures, contributed to the Proceedings of Moriond EW 2004High Energy Physics - Experimenttext