$\mathit CP$ VIOLATION

$\mathit A_{CP}$ is defined as
${B( {{\overline{\mathit B}}} \rightarrow {{\overline{\mathit f}}} )–B( {{\mathit B}} \rightarrow {{\mathit f}} )\over B( {{\overline{\mathit B}}} \rightarrow {{\overline{\mathit f}}} )+B( {{\mathit B}} \rightarrow {{\mathit f}} )}$,
the $\mathit CP$-violation charge asymmetry of inclusive ${{\mathit B}^{\pm}}$ and ${{\mathit B}^{0}}$ decay.

$\mathit A_{CP}$( ${{\mathit B}}$ $\rightarrow$ ${{\mathit s}}{{\mathit \gamma}}$ )

INSPIRE   PDGID:
S049CP2
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.015 \pm0.011}$ OUR AVERAGE
$0.0144$ $\pm0.0128$ $\pm0.0011$ 1
WATANUKI
2019
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
$0.017$ $\pm0.019$ $\pm0.010$ 2
LEES
2014K
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$-0.011$ $\pm0.030$ $\pm0.014$ 3
AUBERT
2008BJ
 BABR Repl. by LEES 2014K
$0.025$ $\pm0.050$ $\pm0.015$ 4
AUBERT,B
2004E
 BABR Repl. by AUBERT 2008BJ
$0.002$ $\pm0.050$ $\pm0.030$ 5
NISHIDA
2004
BELL Repl. by WATANUKI 2019
1  Using a sum-of-exclusive technique with ${\mathit m}_{{{\mathit X}_{{s}}}}$ $<$ 2.8 GeV/c${}^{2}$.
2  Measured with 16 exclusively reconstructed ${{\mathit B}}$ $\rightarrow$ ${{\mathit X}_{{s}}}{{\mathit \gamma}}$ decays with 0.6 $<$ ${\mathit m}_{{{\mathit X}_{{s}}}}<$ 2.0 GeV/c${}^{2}$ (ten charged and six neutral self-tagging ${{\mathit B}}$ modes).
3  Uses a sum of exclusively reconstructed ${{\mathit B}}$ $\rightarrow$ ${{\mathit X}_{{s}}}$ decay modes, with ${{\mathit X}_{{s}}}$ mass between 0.6 and 2.8 GeV/c${}^{2}$.
4  Corresponds to $−$0.06 $<$ $\mathit A_{CP}$ $<$ 0.11 at 90$\%$ CL.
5  This measurement is performed inclusively for recoil mass ${{\mathit X}_{{s}}}$ less than 2.1 GeV, which corresponds to $-0.093$ $<$ ${{\mathit A}_{{CP}}}$ $<$ 0.096 at 90$\%$ CL.
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
WATANUKI 2019
PR D99 032012 Measurements of isospin asymmetry and difference of direct $CP$ asymmetries in inclusive $B \to X_s \gamma$ decays
LEES 2014K
PR D90 092001 Measurements of Direct $\mathit CP$ Asymmetries in ${{\mathit B}}$ $\rightarrow$ ${{\mathit X}_{{s}}}{{\mathit \gamma}}$ Decays using Sum of Exclusive Decays
AUBERT 2008BJ
PRL 101 171804 Measurement of the $\mathit CP$ Asymmetry in ${{\mathit b}}$ $\rightarrow$ ${{\mathit s}}{{\mathit \gamma}}$ using a Sum of Exclusive Final States
AUBERT,B 2004E
PRL 93 021804 Measurement of the Direct $\mathit CP$ Asymmetry in ${\mathit {\mathit b}}$ $\rightarrow$ ${\mathit {\mathit s}}$ ${{\mathit \gamma}}$ Decays
NISHIDA 2004
PRL 93 031803 Measurement of the $\mathit CP$ Asymmetry in ${{\mathit B}}$ $\rightarrow$ ${{\mathit X}_{{s}}}{{\mathit \gamma}}$