B → Charmonium(-like) decays at Belle

The recent Belle results for the B decays into the final states having a ψ are reported. Search for → ψη' is performed and no significant signal is observed. The upper limits of the branching fractions are obtained to be (→ ψη' 8 8 × 10-5 and (0 → ψη0s) 2 5 × 10-5 at 90 % C.L. The 0 → ψη decay is observed with 8.1 σ statistical significance, the branching fraction is obtained to be (0 → ψη) (9.5 1.7 0.8) × 10-5. The study on 0 → ψπ+π− decays are performed and ρ0 meson is found to be the dominant source of the di-pion. The obtained branching fractions are (0 → ψπ+π−) (2.4 0.3 0.2) × 10-5 and (0 → ψ ρ0) (2.0 0.2 0.2) × 10-5. The results for 0 → ψπ+π− are preliminary.