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

B( ${{\mathit \chi}_{{{b1}}}{(1P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b1}}}{(1P)}}$) ${\times }$ B( ${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$) INSPIRE search

M077B02

VALUE ($ 10^{-5} $)

EVTS

DOCUMENT ID

TECN

COMMENT

$\bf{ 1.30 \pm0.34}$

OUR AVERAGE

$1.16$ ${}^{+0.78}_{-0.67}$ ${}^{+0.14}_{-0.16}$

LEES

2014

BABR

${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$

$1.33$ $\pm0.30$ $\pm0.23$

KORNICER

2011

CLEO

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

¹ From a sample of ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ with converted photons.

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