$\mathit CP$ VIOLATION

$\mathit A_{CP}$ is defined as
${B( {{\mathit B}^{-}} \rightarrow {{\overline{\mathit f}}} )–B( {{\mathit B}^{+}} \rightarrow {{\mathit f}} )\over B( {{\mathit B}^{-}} \rightarrow {{\overline{\mathit f}}} )+B( {{\mathit B}^{+}} \rightarrow {{\mathit f}} )}$,
the $\mathit CP$-violation charge asymmetry of exclusive ${{\mathit B}^{-}}$ and ${{\mathit B}^{+}}$ decay.

$\mathit A_{CP}$( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{+}}$ [ ${{\mathit \phi}}{{\mathit \phi}}$ ]$_{{{\mathit \eta}_{{c}}}}$)

INSPIRE   PDGID:
S041CTB
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.10 \pm0.08}$ OUR AVERAGE
$0.12$ $\pm0.12$ $\pm0.01$ 1
MOHANTY
2021
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.09$ $\pm0.10$ $\pm0.02$ 1
LEES
2011A
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
1  ${\mathit m}_{\mathrm { {{\mathit \phi}} {{\mathit \phi}} }}$ is consistent with ${{\mathit \eta}_{{c}}}$ mass in [2.94, 3.02] GeV/c${}^{2}$.
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
MOHANTY 2021
PR D103 052013 Measurement of branching fraction and search for $CP$ violation in $B\to \phi \phi K$
LEES 2011A
PR D84 012001 Measurements of Branching Fractions and $\mathit CP$ Asymmetries and Studies of Angular Distributions for ${{\mathit B}}$ $\rightarrow$ ${{\mathit \phi}}{{\mathit \phi}}{{\mathit K}}$ Decays