$\mathit CP$ 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.

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

INSPIRE   PDGID:
S041CP3
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ -0.37 \pm0.08}$ OUR AVERAGE
$-0.38$ $\pm0.11$ $\pm0.01$
HOI
2012
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$-0.36$ $\pm0.11$ $\pm0.03$
AUBERT
2009AV
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$-0.22$ $\pm0.11$ $\pm0.01$
AUBERT
2007AE
 BABR Repl. by AUBERT 2009AV
$-0.39$ $\pm0.16$ $\pm0.03$
CHANG
2007B
 BELL Repl. by HOI 2012
$-0.20$ $\pm0.15$ $\pm0.01$
AUBERT,B
2005K
 BABR Repl. by AUBERT 2007AE
$-0.49$ $\pm0.31$ $\pm0.07$
CHANG
2005A
 BELL Repl. by CHANG 2007B
$-0.52$ $\pm0.24$ $\pm0.01$
AUBERT
2004H
 BABR Repl. by AUBERT,B 2005K
Conservation Laws:
$\mathit CP$ VIOLATION OBSERVED
References:
HOI 2012
PRL 108 031801 Evidence for Direct $\mathit CP$ Violation in ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit h}^{\pm}}$ and Observation of ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit K}^{0}}$
AUBERT 2009AV
PR D80 112002 ${{\mathit B}}$ Meson Decays to Charmless Meson Pairs Containing ${{\mathit \eta}}$ or ${{\mathit \eta}^{\,'}}$ Mesons
AUBERT 2007AE
PR D76 031103 Branching Fraction and $\mathit CP$-Violation Charge Asymmetry Measurements for ${{\mathit B}}$-Meson Decays to ${{\mathit \eta}}{{\mathit K}^{\pm}}$ , ${{\mathit \eta}}{{\mathit \pi}^{\pm}}$ , ${{\mathit \eta}^{\,'}}{{\mathit K}}$ , ${{\mathit \eta}^{\,'}}{{\mathit \pi}^{\pm}}$ , ${{\mathit \omega}}{{\mathit K}}$ , and ${{\mathit \omega}}{{\mathit \pi}^{\pm}}$
CHANG 2007B
PR D75 071104 Improved Measurements of Branching Fractions and $\mathit CP$ Asymmetries in ${{\mathit B}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit h}}$ Decays
AUBERT,B 2005K
PRL 95 131803 Measurement of Branching Fractions and Charge Asymmetries in ${{\mathit B}^{+}}$ Decays to ${{\mathit \eta}}{{\mathit \pi}^{+}}$ , ${{\mathit \eta}}{{\mathit K}^{+}}$ , ${{\mathit \eta}}{{\mathit \rho}^{+}}$ , and ${{\mathit \eta}^{\,'}}{{\mathit \pi}^{+}}$ , and Search for ${{\mathit B}^{0}}$ Decays to ${{\mathit \eta}}{{\mathit K}^{0}}$ and ${{\mathit \eta}}{{\mathit \omega}}$
CHANG 2005A
PR D71 091106 Measurements of Branching Fractions and $\mathit CP$ Asymmetries in ${{\mathit B}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit h}}$ Decays
AUBERT 2004H
PRL 92 061801 Observation of ${{\mathit B}^{0}}$ $\rightarrow$ ${{\mathit \omega}}{{\mathit K}^{0}}$ , ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit \pi}^{+}}$ , and ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit \eta}}{{\mathit K}^{+}}$ and Study of Related Decays