Belle: INSPIRE
Comment: Used BR( Y(4S) -> B0 B0bar ) / BR( Y(4S) -> B+ B- ) = 1 with 8% uncertainty
| Parameter | Measurement |
|---|---|
| \(\frac{{\cal{B}} ( B^{-} \to J/\psi K_1(1270)^{-} )}{{\cal{B}} ( B^{-} \to J/\psi K^{-} )}\) | \([1.80 \pm 0.34\mbox{ (stat)} \pm 0.34\mbox{ (syst)}]\) |
| \(\frac{{\cal{B}} ( B^{-} \to J/\psi K_1^{-}(1400) )}{{\cal{B}} ( B^{-} \to J/\psi K_1(1270)^{-} )}\) | \(0.30\) |
| \(\frac{{\cal{B}} ( \bar{B}^{0} \to J/\psi \bar{K}_1^{0}(1270) )}{{\cal{B}} ( B^{-} \to J/\psi K^{-} )}\) | \([1.30 \pm 0.34\mbox{ (stat)} \pm 0.28\mbox{ (syst)}]\) |
| \({\cal{B}} ( B^{-} \to J/\psi K_1(1270)^{-} )\) | \([1.80 \pm 0.34\mbox{ (stat)} \pm 0.30\mbox{ (syst)} \pm 0.25\mbox{ (k(1270) br (correlated))}] \times 10^{-3}\) |
| \({\cal{B}} ( \bar{B}^{0} \to J/\psi \bar{K}_1^{0}(1270) )\) | \([1.30 \pm 0.34\mbox{ (stat)} \pm 0.25\mbox{ (syst)} \pm 0.18\mbox{ (k(1270) br (correlated))}] \times 10^{-3}\) |