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

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

$\mathit A_{\mathit CP}$( ${{\mathit K}^{\mp}}$2 ${{\mathit \pi}^{\pm}}$ ) in ${{\mathit D}^{+}}$ $\rightarrow$ ${{\mathit K}^{-}}$2 ${{\mathit \pi}^{+}}$ , ${{\mathit D}^{-}}$ $\rightarrow$ ${{\mathit K}^{+}}$2 ${{\mathit \pi}^{-}}$

INSPIRE   PDGID:
S031A01
VALUE (%) EVTS DOCUMENT ID TECN  COMMENT
$\bf{ -0.18 \pm0.16 }$ OUR AVERAGE
$-0.16$ $\pm0.15$ $\pm0.09$ 2.3M
ABAZOV
2014L
 D0 ${{\mathit p}}{{\overline{\mathit p}}}$ , $\sqrt {s }$ = 1.96 TeV
$-0.3$ $\pm0.2$ $\pm0.4$
BONVICINI
2014
CLEO All CLEO-c runs
• • We do not use the following data for averages, fits, limits, etc. • •
$-0.1$ $\pm0.4$ $\pm0.9$ 231k
MENDEZ
2010
CLEO See BONVICINI 2014
$-0.5$ $\pm0.4$ $\pm0.9$
DOBBS
2007
CLEO See MENDEZ 2010
Conservation Laws:
$\mathit CP$ INVARIANCE
References:
ABAZOV 2014L
PR D90 111102 Measurement of the Direct $\mathit CP$-Violating Parameter $\mathit A_{CP}$ in the Decay ${{\mathit D}^{+}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}$
BONVICINI 2014
PR D89 072002 Updated Measurements of Absolute ${{\mathit D}^{+}}$ and ${{\mathit D}^{0}}$ Hadronic Branching Fractions and $\sigma\mathrm {( {{\mathit e}^{+}} {{\mathit e}^{-}} \rightarrow {{\mathit D}} {{\overline{\mathit D}}} )}$ at $\mathit E_{{\mathrm {cm}}}$ = 3774 MeV
MENDEZ 2010
PR D81 052013 Measurements of ${{\mathit D}}$ Meson Decays to Two Pseudoscalar Mesons
DOBBS 2007
PR D76 112001 Measurement of Absolute Hadronic Branching Fractions of ${{\mathit D}}$ Mesons and ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}}{{\overline{\mathit D}}}$ Cross Sections at the ${{\mathit \psi}{(3770)}}$