${{\mathit D}^{0}}$ $\mathit CP$-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 $( ${{\overline{\mathit D}}^{0}}$ $\rightarrow$ ${{\overline{\mathit f}}}$ )].

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

INSPIRE   PDGID:
S032A1
VALUE (%) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ (-70 \pm110) \times 10^{-3} }$ OUR AVERAGE
$0.04$ $\pm0.12$ $\pm0.10$ 4.56M
AAIJ
2017M
 LHCB ${{\mathit p}}{{\mathit p}}$ 7, 8 TeV
$-0.24$ $\pm0.22$ $\pm0.09$ 476k 1
AALTONEN
2012B
 CDF ${{\mathit p}}{{\overline{\mathit p}}}$ , $\sqrt {s }$=1.96 TeV
$0.00$ $\pm0.34$ $\pm0.13$ 129k 2
AUBERT
2008M
 BABR ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}$ 10.6 GeV
$-0.43$ $\pm0.30$ $\pm0.11$ 120k 3
STARIC
2008
BELL ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}{{\mathit \Upsilon}{(4S)}}$
$+2.0$ $\pm1.2$ $\pm0.6$ 4
ACOSTA
2005C
 CDF ${{\mathit p}}{{\overline{\mathit p}}}$ , $\sqrt {s }$=1.96 TeV
$0.0$ $\pm2.2$ $\pm0.8$ 3023 4
CSORNA
2002
CLE2 ${{\mathit e}^{+}}{{\mathit e}^{-}}$ $\approx{}{{\mathit \Upsilon}{(4S)}}$
$-0.1$ $\pm2.2$ $\pm1.5$ 3330 4
LINK
2000B
 FOCS
$-1.0$ $\pm4.9$ $\pm1.2$ 609 4
AITALA
1998C
 E791 $-0.093<\mathit A_{\mathit CP}<+0.073$ (90$\%$ CL)
• • We do not use the following data for averages, fits, limits, etc. • •
$-0.06$ $\pm0.15$ $\pm0.10$ 1.8M 1
AAIJ
2014AK
 LHCB See AAIJ 2017M
1  See also "${{\mathit D}^{0}}$ $\mathit CP$-violating asymmetry differences" at the end of the $\mathit CP$-violating asymmetries.
2  AUBERT 2008M uses corrected numbers of events directly, not ratios with ${{\mathit K}^{\mp}}{{\mathit \pi}^{\pm}}$ events.
3  STARIC 2008 uses ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}$ and ${{\overline{\mathit D}}^{0}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit \pi}^{-}}$ decays to correct for detector-induced asymmetries.
4  AITALA 1998C, LINK 2000B, CSORNA 2002 , and ACOSTA 2005C measure $\mathit N$( ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ )/$\mathit N$( ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}$ ), the ratio of numbers of events observed, and similarly for the ${{\overline{\mathit D}}^{0}}$.
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
AAIJ 2017M
PL B767 177 Measurement of $\mathit CP$ Asymmetry in ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit K}^{+}}$ Decays
AAIJ 2014AK
JHEP 1407 041 Measurement of $\mathit CP$ Asymmetry in ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit K}^{+}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$ Decays
AALTONEN 2012B
PR D85 012009 Measurement of $\mathit CP$-Violating Asymmetries in ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ Decays at CDF
AUBERT 2008M
PRL 100 061803 Search for $\mathit CP$ Violation in the Decays D0-->K-K+ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$
STARIC 2008
PL B670 190 Search for a $\mathit CP$ Asymmetry in Cabibbo-Suppressed ${{\mathit D}^{0}}$ Decays
ACOSTA 2005C
PRL 94 122001 Measurement of Partial Width and Search for Direct $\mathit CP$ Violation in ${{\mathit D}^{0}}$ Meson Decays to ${{\mathit K}^{-}}{{\mathit K}^{+}}$ and ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$
CSORNA 2002
PR D65 092001 Lifetime Differences, Direct $\mathit CP$ Violation and Partial Width in ${{\mathit D}^{0}}$ Meson Decays to ${{\mathit K}^{+}}{{\mathit K}^{-}}$ and ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$
LINK 2000B
PL B491 232 Search for $\mathit CP$ Violation in ${{\mathit D}^{0}}$ and ${{\mathit D}^{+}}$ Decays
Also
PL B495 443 (errat.) Erratum: LINK 2000B Search for $\mathit CP$ Violation in ${{\mathit D}^{0}}$ and ${{\mathit D}^{+}}$ Decays
AITALA 1998C
PL B421 405 Branching Fractions for ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ , and a Search for $\mathit CP$ Violation in ${{\mathit D}^{0}}$ Decays