${{\mathit D}_{{{s}}}^{+}}−{{\mathit D}_{{{s}}}^{-}}$ $\mathit CP$-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
$\bf{ (-60 \pm220) \times 10^{-3} }$ OUR AVERAGE  Error includes scale factor of 1.6.
($10$ $\pm120$ $\pm80$) $ \times 10^{-3}$ ~1M
AAIJ
2023E
 LHCB 6 fb${}^{-1}$, ${{\mathit p}}{{\mathit p}}$ at 13 TeV, ${{\mathit \eta}}$ $\rightarrow$ ${{\mathit \gamma}}{{\mathit \pi}}{{\mathit \pi}}$
$-0.82$ $\pm0.36$ $\pm0.35$ 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