PARTIAL BRANCHING FRACTIONS

B( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$) (1.0 $<$ q${}^{2}<$ 6.0 GeV${}^{2}$/c${}^{4}$)

INSPIRE   PDGID:
S041PBF
VALUE ($ 10^{-7} $) DOCUMENT ID TECN  COMMENT
$\bf{ 1.26 \pm0.12}$ OUR AVERAGE  Error includes scale factor of 1.9.  See the ideogram below.
$2.30$ ${}^{+0.41}_{-0.38}$ $\pm0.05$ 1
CHOUDHURY
2021
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$1.66$ ${}^{+0.32}_{-0.29}$ $\pm0.04$ 2
CHOUDHURY
2021
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$1.40$ ${}^{+0.98}_{-0.34}$ $\pm0.69$ 3
AAIJ
2019S
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV
$1.19$ $\pm0.034$ $\pm0.059$ 4
AAIJ
2014M
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$1.41$ $\pm0.20$ $\pm0.10$
AALTONEN
2011AI
 CDF ${{\mathit p}}{{\overline{\mathit p}}}$ at 1.96 TeV
• • We do not use the following data for averages, fits, limits, etc. • •
$1.56$ ${}^{+0.19}_{-0.15}$ ${}^{+0.06}_{-0.04}$ 5
AAIJ
2014AR
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$1.205$ $\pm0.085$ $\pm0.070$
AAIJ
2013H
 LHCB Repl. by AAIJ 2014M
1  Measured for ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ decays. Measurements in other q${}^{2}$ bins are also reported.
2  Measured for ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ decays. Measurements in other q${}^{2}$ bins are also reported.
3  Measured by taking the ratio of the branching fraction from ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ and ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}$( ${{\mathit e}^{+}}{{\mathit e}^{-}}$) ${{\mathit K}^{+}}$ decays and multiplying it by the measured value of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{+}}$ and ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ as in PDG 2018. The branching fraction of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ is determined in the region 1.1 $<$ q${}^{2}$ $<$ 6 GeV${}^{2}$/c${}^{4}$.
4  Uses B( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}{(1S)}}{{\mathit K}^{+}}$) = ($0.998$ $\pm0.014$ $\pm0.040$) $ \times 10^{-3}$ for normalization and ${{\mathit \mu}^{+}}{{\mathit \mu}^{-}}$ for leptons. Measured for 1.1 $<$ q${}^{2}<$ 6.0 GeV${}^{2}$/c${}^{4}$.
5  Measured by taking the ratio of the branching fraction from ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ and ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}$( ${{\mathit e}^{+}}{{\mathit e}^{-}}$) ${{\mathit K}^{+}}$decays and multiplying it by the measured value of ${{\mathit B}^{+}}$ ${{\mathit K}^{+}}$ and ${{\mathit J / \psi}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit e}^{-}}$ as in PDG 2012.The branching fraction of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit e}^{+}}{{\mathit e}^{-}}$ is determined in the region 1 $<$ q${}^{2}$ $<$ 6 GeV${}^{2}$/c${}^{4}$.

           B( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit \ell}^{+}}{{\mathit \ell}^{-}}$) (1.0 $<$ q${}^{2}<$ 6.0 GeV${}^{2}$/c${}^{4}$) ($ 10^{-7} $)
References