${{\mathit D}_{{s}}^{+}}−{{\mathit D}_{{s}}^{-}}$ $\mathit CP$-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 $( ${{\mathit D}_{{s}}^{-}}$ $\rightarrow$ ${{\overline{\mathit f}}}$ )].

$\mathit A_{CP}$( ${{\mathit \pi}^{\pm}}{{\mathit \eta}^{\,'}}$ ) in ${{\mathit D}_{{s}}^{\pm}}$ $\rightarrow$ ${{\mathit \pi}^{\pm}}{{\mathit \eta}^{\,'}}$

INSPIRE   PDGID:
S034A11
VALUE (%) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ -0.9 \pm0.5 }$ OUR AVERAGE
$-0.82$ $\pm0.36$ $\pm0.35$ 152k
AAIJ
2017AF
 LHCB ${{\mathit p}}{{\mathit p}}$ at 7, 8 TeV
$-2.2$ $\pm2.2$ $\pm0.6$
ONYISI
2013
CLEO ${{\mathit e}^{+}}{{\mathit e}^{-}}$ at 4.17 GeV
• • We do not use the following data for averages, fits, limits, etc. • •
$-6.1$ $\pm3.0$ $\pm0.3$ 1.4k
MENDEZ
2010
CLEO See ONYISI 2013
$-5.5$ $\pm3.7$ $\pm1.2$
ALEXANDER
2008
CLEO See MENDEZ 2010
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
AAIJ 2017AF
PL B771 21 Measurement of $\mathit CP$ Asymmetries in ${{\mathit D}^{\pm}}$ $\rightarrow$ ${{\mathit \eta}^{\,'}}{{\mathit \pi}^{\pm}}$ and ${{\mathit D}_{{s}}^{\pm}}$ $\rightarrow$ ${{\mathit \eta}^{\,'}}{{\mathit \pi}^{\pm}}$ Decays
ONYISI 2013
PR D88 032009 Improved Measurement of Absolute Hadronic Branching Fractions of the ${{\mathit D}_{{s}}^{+}}$ Meson
MENDEZ 2010
PR D81 052013 Measurements of ${{\mathit D}}$ Meson Decays to Two Pseudoscalar Mesons
ALEXANDER 2008
PRL 100 161804 Absolute Measurement of Hadronic Branching Fractions of the ${{\mathit D}_{{s}}^{+}}$ Meson