$\Delta \mathit A_{CP}$ = $\mathit A_{CP}({{\mathit K}^{+}}{{\mathit K}^{-}}$) $−$ $\mathit A_{CP}({{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$)
INSPIRE search
$\mathit CP$ violation in these modes can come from the decay amplitudes (direct) and/or from mixing or interference of mixing and decay (indirect). The difference $\Delta \mathit A_{CP}$ is primarily sensitive to the direct component, and only retains a second-order dependence on the indirect component for measurements where the mean decay time of the ${{\mathit K}^{+}}{{\mathit K}^{-}}$ and ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ samples are not identical. The results below are averaged assuming the indirect component can be neglected.
| S032DCP |
| $-0.154$ $\pm0.029$ |
53M,17M |
|
|
LHCB |
| • • • We do not use the following data for averages, fits, limits, etc. • • • |
| $-0.10$ $\pm0.08$ $\pm0.03$ |
6.5M,2.2M |
|
|
LHCB |
| $0.14$ $\pm0.16$ $\pm0.08$ |
2.2M,0.8M |
|
|
LHCB |
| $0.49$ $\pm0.30$ $\pm0.14$ |
0.56M,0.22M |
|
|
LHCB |
| $-0.82$ $\pm0.21$ $\pm0.11$ |
1.4M,0.4M |
|
|
LHCB |
| $-0.46$ $\pm0.31$ $\pm0.12$ |
|
|
|
CDF |
| $-0.62$ $\pm0.21$ $\pm0.10$ |
|
|
|
CDF |
| $0.24$ $\pm0.62$ $\pm0.26$ |
|
1 |
|
BABR |
| $-0.86$ $\pm0.60$ $\pm0.07$ |
120k |
|
|
BELL |
|
1
Calculated from the AUBERT 2008M values of $\mathit A_{CP}({{\mathit K}^{+}}{{\mathit K}^{-}}$) and $\mathit A_{CP}({{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$). The systematic error here combines the systematic errors in quadrature, and therefore somewhat over-estimates it.
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| Conservation Laws: |
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| References: |
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PRL 122 211803
|
Observation of CP Violation in Charm Decays |
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PRL 116 191601
|
Measurement of the Difference of Time-Integrated $\mathit CP$ Asymmetries in ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit K}^{+}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$ Decays |
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JHEP 1407 041
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Measurement of $\mathit CP$ Asymmetry in ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit K}^{+}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$ Decays |
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|
PL B723 33
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Search for Direct $\mathit CP$ Violation in ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit h}^{-}}{{\mathit h}^{+}}$ Modes using Semileptonic ${{\mathit B}}$ Decays |
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PRL 108 111602
|
Evidence for $\mathit CP$ Violation in Time-Integrated ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit h}^{-}}{{\mathit h}^{+}}$ Decay Rates |
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PR D85 012009
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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 |
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PRL 109 111801
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Measurement of the Difference in $\mathit CP$-Violating Asymmetries in ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{+}}{{\mathit K}^{-}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Decays at CDF |
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PRL 100 061803
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Search for $\mathit CP$ Violation in the Decays D0-->K-K+ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit \pi}^{-}}{{\mathit \pi}^{+}}$ |
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PL B670 190
|
Search for a $\mathit CP$ Asymmetry in Cabibbo-Suppressed ${{\mathit D}^{0}}$ Decays |
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