${{\mathit D}^{0}}$ $\mathit CP$-VIOLATING DECAY-RATE ASYMMETRIES

This is the difference between ${{\mathit D}^{0}}$ and ${{\overline{\mathit D}}^{0}}$ partial widths for the decay to state ${{\mathit f}}$, divided by the sum of the widths:$
$ $\mathit A_{CP}({{\mathit f}}$) = [$\Gamma ({{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit f}}$) $−$ $\Gamma ({{\overline{\mathit D}}^{0}}$ $\rightarrow$ ${{\overline{\mathit f}}}$)] $/$ [$\Gamma ({{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit f}}$) + $\Gamma ({{\overline{\mathit D}}^{0}}$ $\rightarrow$ ${{\overline{\mathit f}}}$)].

$\mathit A_{\mathit CP}$(2 ${{\mathit K}_S^0}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$) in ${{\mathit D}^{0}}$ , ${{\overline{\mathit D}}^{0}}$ $\rightarrow$ 2 ${{\mathit K}_S^0}$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$

INSPIRE   JSON  (beta) PDGID:
S032D54
VALUE ($ 10^{-2} $) EVTS DOCUMENT ID TECN  COMMENT
$-2.54$ $\pm1.44$ ${}^{+0.11}_{-0.10}$ 6095 1
SANGAL
2023
BELL ${{\mathit e}^{+}}{{\mathit e}}$ at ${{\mathit \Upsilon}{(4S,5S)}}$, 10.520 GeV
1  SANGAL 2023 also measures the parity asymmetry $\mathit A_{T}$ in the sign of the triple product of momenta between one ${{\mathit K}_S^0}$ (the one with higher momentum) and the two charged pions, and reports the resulting $\mathit CP$ asymmetry between the $\mathit CP$ conjugate modes ($\mathit A_{T}$ $−$ $\bar A_{T}$)/2 = ($-1.95$ $\pm1.42$ ${}^{+0.14}_{-0.12}$) $ \times 10^{-2}$.
References