$\mathit CP$ 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.

$\mathit A_{CP}$( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit f}_{{2}}{(1270)}}{{\mathit \pi}^{+}}$ )

INSPIRE   PDGID:
S041CQ0
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.40 \pm0.06}$ OUR AVERAGE
$0.468$ $\pm0.061$ $\pm0.046$ 1
AAIJ
2020A
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$0.267$ $\pm0.102$ $\pm0.048$ 2
AAIJ
2019AL
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$0.41$ $\pm0.25$ ${}^{+0.18}_{-0.15}$
AUBERT
2009L
 BABR ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$-0.004$ $\pm0.247$ ${}^{+0.028}_{-0.032}$
AUBERT,B
2005G
 BABR Repl. by AUBERT 2009L
1  This result is obtained with an amplitude analysis of ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ decays, using the isobar model within the mass range 1.0 $<$ m( ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ ) $<$ 1.5 GeV to describe the ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ ${\mathit S}{\mathrm -wave}$ contribution.
2  Uses amplitude analysis of ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit K}^{+}}{{\mathit K}^{-}}$ decays.
Conservation Laws:
$\mathit CP$ VIOLATION OBSERVED
References:
AAIJ 2020A
PRL 124 031801 Observation of Several Sources of $CP$ Violation in $B^+ \to \pi^+ \pi^+ \pi^-$ Decays
Also
PR D101 012006 Amplitude analysis of the $B^+ \rightarrow \pi^+\pi^+\pi^-$ decay
AAIJ 2019AL
PRL 123 231802 Amplitude analysis of $B^{\pm} \to \pi^{\pm} K^{+} K^{-}$ decays
AUBERT 2009L
PR D79 072006 Dalitz Plot Analysis of ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit \pi}^{\pm}}{{\mathit \pi}^{\mp}}$ Decays
AUBERT,B 2005G
PR D72 052002 Amplitude Analysis of the Decay ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit \pi}^{\pm}}{{\mathit p}^{\mp}}$