(for the BABAR Collaboration) We present measurements related to the CKM angle β 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 cos2β with B 0 → J/ψ “K ∗0 ” events is explained and related results reported. Recent CP measurements in the penguin dominated modes B 0 → φK 0, B 0 → K + K − K 0 S, B0 → π 0 K 0 S and B 0 → f0 (980)K 0 S are presented. Contributed to the Proceedings of the 39 th Rencontres De Moriond On Electroweak Interaction
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