$\mathit CP$ 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.

$\mathit A_{CP}$( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}$( ${{\mathit K}^{+}}{{\mathit K}^{-}})_{{\mathit S}{\mathrm -wave}}$)

INSPIRE   PDGID:
S041A17
VALUE DOCUMENT ID TECN  COMMENT
$-0.664$ $\pm0.038$ $\pm0.019$ 1
AAIJ
2019AL
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
1  Uses amplitude analysis of ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ decays in the ${{\mathit \pi}}{{\mathit \pi}}$ $−$ ${{\mathit K}}{{\mathit K}}$ rescattering mass region of 0.95 $<$ m( ${{\mathit K}^{+}}{{\mathit K}^{-}}$ ) $<$ 1.42 GeV/c${}^{2}$.
Conservation Laws:
$\mathit CP$ VIOLATION OBSERVED
References:
AAIJ 2019AL
PRL 123 231802 Amplitude analysis of $B^{\pm} \to \pi^{\pm} K^{+} K^{-}$ decays