${{\mathit \chi}_{{{b1}}}{(1P)}}$ Cross-Particle Branching Ratios

B( ${{\mathit \chi}_{{{b1}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b1}}}{(1P)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$) INSPIRE search

M077B01

VALUE ($ 10^{-4} $)

EVTS

DOCUMENT ID

TECN

COMMENT

$\bf{ 5.90 \pm0.34}$

OUR AVERAGE Error includes scale factor of 1.3.

$6.86$ ${}^{+0.47}_{-0.45}$ ${}^{+0.44}_{-0.35}$

LEES

2014

BABR

${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

$5.65$ $\pm0.11$ $\pm0.27$

3222

KORNICER

2011

CLEO

${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$

$5.8$ $\pm0.9$ $\pm0.7$

WALK

1986

CBAL

${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$

¹ From a sample of ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ with one converted photon.

B( ${{\mathit \chi}_{{{b1}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(2S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b1}}}{(1P)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$) ($ 10^{-4} $)

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

WALK

1986

PR D34 2611

The ${{\mathit \chi}_{{{b}}}}$ States in Exclusive Radiative Decay of the ${{\mathit \Upsilon}{(2S)}}$