2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/37407The status of CP violation in $B^0\to π^+π^-$ and the determination of $\sin 2ϕ_2 (α)$ from the $B$ factories is described.Invited talk at the XXIII Physics in Collision Conference (PIC02) Stanford, CA USA, June 2002, 11 pages, 5 eps figures, PSNTHAT02. To appear in the ProceedingsHigh Energy Physics - ExperimentResults on $\sin 2ϕ_2 (α)$ from the B Factoriestext