${{\mathit D}_{{s}}^{+}}$ $−{{\mathit D}_{{s}}^{-}}$ $\mathit CP$-VIOLATING DECAY-RATE ASYMMETRIES

This is the difference between ${{\mathit D}_{{s}}^{+}}$ and ${{\mathit D}_{{s}}^{-}}$ partial widths for the decay to state ${{\mathit f}}$ , divided by the sum of the widths:$
$ $\mathit A_{CP}({{\mathit f}}$ )= [$\Gamma $( ${{\mathit D}_{{s}}^{+}}$ $\rightarrow$ ${{\mathit f}}$ ) $−$ $\Gamma $( ${{\mathit D}_{{s}}^{-}}$ $\rightarrow$ ${{\overline{\mathit f}}}$ )] $/$ [$\Gamma $( ${{\mathit D}_{{s}}^{+}}$ $\rightarrow$ ${{\mathit f}}$ )+$\Gamma $( ${{\mathit D}_{{s}}^{-}}$ $\rightarrow$ ${{\overline{\mathit f}}}$ )].

$\mathit A_{CP}$( ${{\mathit K}^{\pm}}{{\mathit \pi}^{0}}$ ) in ${{\mathit D}_{{s}}^{\pm}}$ $\rightarrow$ ${{\mathit K}^{\pm}}{{\mathit \pi}^{0}}$

INSPIRE  
VALUE (%) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ 2 \pm4 }$ OUR AVERAGE  Error includes scale factor of 1.2.
$-0.8$ $\pm3.9$ $\pm1.2$ 2.8k
AAIJ
2021U
LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8, 13 TeV
$6.4$ $\pm4.4$ $\pm1.1$ 12k
GUAN
2021
BELL ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}{{\mathit \Upsilon}{(4,5S)}}$
• • We do not use the following data for averages, fits, limits, etc. • •
$-26.6$ $\pm23.8$ $\pm0.9$ 202
MENDEZ
2010
CLEO ${{\mathit e}^{+}}{{\mathit e}^{-}}$ at 4170 MeV
$2$ $\pm29$
ADAMS
2007A
CLEO See MENDEZ 2010
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
AAIJ 2021U
JHEP 2106 019 Search for $CP$ violation in $D_{(s)}^{+}\rightarrow h^{+}\pi^{0}$ and $D_{(s)}^{+}\rightarrow h^{+}\eta$ decays
GUAN 2021
PR D103 112005 Measurement of branching fractions and $CP$ asymmetries for $D_s^{+} \rightarrow K^+ (\eta, \pi^0) $ and $D_s^{+} \rightarrow \pi^+ (\eta, \pi^0)$ decays at Belle
MENDEZ 2010
PR D81 052013 Measurements of ${{\mathit D}}$ Meson Decays to Two Pseudoscalar Mesons
ADAMS 2007A
PRL 99 191805 Suppressed Decays of ${{\mathit D}_{{s}}^{+}}$ Mesons to Two Pseudoscalar Mesons