${{\mathit \chi}_{{{b1}}}{(2P)}}$ Cross-Particle Branching Ratios

B(${{\mathit \chi}_{{{b1}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b1}}}{(2P)}}$) ${\times }$ B(${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$)

INSPIRE   JSON  (beta) PDGID:
M080A00
VALUE ($ 10^{-4} $) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 2.9 \pm0.4}$ OUR AVERAGE  Error includes scale factor of 1.9.  See the ideogram below.
$3.52$ ${}^{+0.28}_{-0.27}$ ${}^{+0.17}_{-0.18}$ 1
LEES
2014M
 BABR ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$
$3.24$ $\pm0.56$ $\pm0.41$ 58 2
CRAWFORD
1992B
 CLE2 ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$
$2.34$ $\pm0.28$ $\pm0.15$ 3
HEINTZ
1992
CSB2 ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$
1  From a sample of ${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \gamma}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ with one converted photon.
2  CRAWFORD 1992B quotes 2${\times }B({{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{bJ}}}{(2P)}}$) B(${{\mathit \chi}_{{{bJ}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(nS)}}$) B(${{\mathit \Upsilon}{(nS)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$).
3  Calculated by us. HEINTZ 1992 quotes B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b1}}}{(2P)}}$) ${\times }B({{\mathit \chi}_{{{b1}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) = ($0.91$ $\pm0.11$ $\pm0.06)\%$ using B(${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$) =($2.57$ $\pm0.05)\%$.

           B(${{\mathit \chi}_{{{b1}}}{(2P)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \Upsilon}{(1S)}}$) ${\times }$ B(${{\mathit \Upsilon}{(3S)}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \chi}_{{{b1}}}{(2P)}}$) ${\times }$ B(${{\mathit \Upsilon}{(1S)}}$ $\rightarrow$ ${{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$) ($ 10^{-4} $)
References