$\mathit CP$ 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.

$\mathit A_{CP}$( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{0}}{{\mathit K}^{+}}$ )

INSPIRE   PDGID:
S041CQ8
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.04 \pm0.14}$ OUR AVERAGE
$0.014$ $\pm0.168$ $\pm0.002$
DUH
2013
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.10$ $\pm0.26$ $\pm0.03$ 1
AUBERT,BE
2006C
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$0.13$ ${}^{+0.23}_{-0.24}$ $\pm0.02$
LIN
2007
BELL Repl. by DUH 2013
$0.15$ $\pm0.33$ $\pm0.03$ 2
AUBERT,BE
2005E
 BABR Repl. by AUBERT,BE 2006C
1  Corresponds to 90$\%$ confidence range $-0.31<$ $\mathit A_{\mathit CP}$ $<$ $0.54$.
2  Corresponds to 90$\%$ confidence range $-0.43<$ $\mathit A_{\mathit CP}$ $<0.68$.
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
DUH 2013
PR D87 031103 Measurements of Branching Fractions and Direct $\mathit CP$ Asymmetries for ${{\mathit B}}$ $\rightarrow$ ${{\mathit K}}{{\mathit \pi}}$ , ${{\mathit B}}$ $\rightarrow$ ${{\mathit \pi}}{{\mathit \pi}}$ and ${{\mathit B}}$ $\rightarrow$ ${{\mathit K}}{{\mathit K}}$ Decays
LIN 2007
PRL 98 181804 Observation of ${{\mathit B}}$ Decays to Two Kaons
AUBERT,BE 2006C
PRL 97 171805 Observation of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\overline{\mathit K}}^{0}}{{\mathit K}^{+}}$ and ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit K}^{0}}{{\overline{\mathit K}}^{0}}$
AUBERT,BE 2005E
PRL 95 221801 Evidence for ${{\mathit B}^{+}}$ $\rightarrow$ ${{\overline{\mathit K}}^{0}}{{\mathit K}^{+}}$ and ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit K}^{0}}{{\overline{\mathit K}}^{0}}$ , and Measurement of the Branching Fraction and Search for Direct $\mathit CP$ Violation in ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit K}^{0}}{{\mathit \pi}^{+}}$