${{\mathit \chi}_{{{b0}}}{(1P)}}$ CROSS-PARTICLE BRANCHING RATIOS

B( ${{\mathit \chi}_{{{b0}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b0}}}{(1P)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$) INSPIRE search

M076B01
VALUE ($ 10^{-5} $) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 1.67 \pm0.28}$ OUR AVERAGE
$2.9$ ${}^{+1.7}_{-1.4}$ ${}^{+0.1}_{-0.8}$ 1
LEES
2014M
 BABR ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$
$1.63$ $\pm0.24$ $\pm0.15$ 87
KORNICER
2011
CLEO ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$
1  From a sample of ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ with one converted photon.
  References:
LEES 2014M
PR D90 112010 Bottomonium Spectroscopy and Radiative Transitions Involving the ${{\mathit \chi}_{{{bJ}}}{(1P,2P)}}$ States at BABAR
KORNICER 2011
PR D83 054003 Measurements of Branching Fractions for Electromagnetic Transitions Involving the ${{\mathit \chi}_{{{bJ}}}{(1P)}}$ States