Evidence for X(3872)->psi(2S)gamma in B-+/--> X(3872)K-+/- Decays and a Study of B -> cc gamma K
- In a search for B→cc̄γK decays with the BABAR detector, where cc̄ includes J/ψ and ψ(2S), and K includes K±, KS0, and K*(892), we find evidence for X(3872)→J/ψγ and X(3872)→ψ(2S)γ with 3.6σ and 3.5σ significance, respectively. We measure the product of branching fractions B(B±→ X(3872)K±)×B(X(3872)→J/ψγ)=[2.8±0.8(stat) ±0.1(syst)]×10-6 and B(B±→X(3872)K±) ×B(X(3872)→ψ(2S)γ)=[9.5±2.7(stat)±0.6(syst)] ×10-6. © 2009 The American Physical Society.
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