PRD 70 091104 (2004)

BaBar: INSPIRE link

Comment: Used BR( Y(4S) -> B0 B0bar ) = 0.499 +- 0.012

ParameterMeasurement
\({\cal{B}} ( \bar{B}^0 \to J/\psi(1S) \gamma )\)\(0.016 \times 10^{-4}\)