$\mathit CP$ 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.

$\mathit A_{CP}$( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \pi}^{+}}$ )

INSPIRE   PDGID:
S041AZ2
VALUE DOCUMENT ID TECN  COMMENT
$\bf{ 0.03 \pm0.06}$ OUR AVERAGE
$0.048$ $\pm0.090$ $\pm0.011$ 1
AAIJ
2012AC
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7 TeV
$0.022$ $\pm0.085$ $\pm0.016$
BHARDWAJ
2008
BELL ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \Upsilon}{(4S)}}$
1  Uses $\mathit A_{CP}$( ${{\mathit B}^{+}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit K}^{+}}$ ) = $0.001$ $\pm0.007$ to extract production asymmetry.
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
AAIJ 2012AC
PR D85 091105 Measurements of the Branching Fractions and $\mathit CP$ Asymmetries of ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit J / \psi}}{{\mathit \pi}^{\pm}}$ and ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \pi}^{\pm}}$ Decays
BHARDWAJ 2008
PR D78 051104 Observation of ${{\mathit B}^{\pm}}$ $\rightarrow$ ${{\mathit \psi}{(2S)}}{{\mathit \pi}^{\pm}}$ and Search for Direct $\mathit CP$-Violation