2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/126208The b-->d penguin-dominated modes B-->KKbar have been observed at the B factories. In addition, the BaBar Collaboration has reported the first time-dependent CP-violation measurement in B0-->K0K0bar.Proceedings to the 4th International Workshop on the CKM Unitarity Triangle (CKM2006). Version 2 fixes minor typos and includes a minor update from one of the experimentsHigh Energy Physics - ExperimentB0-->K0K0bar and Other Hadronic b-->d Decaystext