pdgLive Home   >   CHARMED MESONS ($\mathit C$ = $\pm1$)   >   ${{\mathit D}^{0}}$   >   ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{0}}$ COHERENCE FACTOR $\mathit R_{ {{\mathit K}} {{\mathit \pi}} {{\mathit \pi}^{0}} }$

${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{0}}$ COHERENCE FACTOR $\mathit R_{ {{\mathit K}} {{\mathit \pi}} {{\mathit \pi}^{0}} }$

INSPIRE   PDGID:

S032CF1

See the note on `${{\mathit D}^{0}}-{{\overline{\mathit D}}^{0}}$ Mixing' for the definition. $\mathit R_{ {{\mathit K}} {{\mathit \pi}} {{\mathit \pi}^{0}} }$ can have any value between 0 and 1. A value near 1 indicates the decay is dominated by a few intermediate states with limited interference.

VALUE EVTS DOCUMENT ID TECN  COMMENT $\bf{ 0.792 \pm0.033}$ OUR AVERAGE $0.78$ $\pm0.04$ 62.4k 1 ABLIKIM 2021 AA BES3 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}$ at ${{\mathit \psi}{(3770)}}$ $0.82$ $\pm0.06$ 1, 2, 3 EVANS 2016 ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}$ at ${{\mathit \psi}{(3770)}}$ • • We do not use the following data for averages, fits, limits, etc. • • $0.82$ $\pm0.07$ 1, 3 LIBBY 2014 Repl. by EVANS 2016 $0.78$ ${}^{+0.11}_{-0.25}$ 4 LOWREY 2009 CLEO Repl. by LIBBY 2014 1  Uses quantum correlations in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}$ at the ${{\mathit \psi}{(3770)}}$, where the decay rates of $\mathit CP$-tagged ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{0}}$ final states depend on $\mathit R_{ {{\mathit K}} {{\mathit \pi}} {{\mathit \pi}^{0}} }$ and $\delta {}^{ {{\mathit K}} {{\mathit \pi}} {{\mathit \pi}^{0}} }$. 2  A combined fit with a recent LHCb ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}$ mixing results in AAIJ 2016F is also reported to be $0.81$ $\pm0.06$. 3  Obtained by analyzing CLEO-c data but not authored by the CLEO Collaboration. 4  LOWREY 2009 uses quantum correlations in ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit D}^{0}}{{\overline{\mathit D}}^{0}}$ at the ${{\mathit \psi}{(3770)}}$, where the decay rates of $\mathit CP$-tagged ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{0}}$ final states depend on $\mathit R_{ {{\mathit K}} {{\mathit \pi}} {{\mathit \pi}^{0}} }$ and $\delta {}^{ {{\mathit K}} {{\mathit \pi}} {{\mathit \pi}^{0}} }$. A fit that includes external measurements of charm mixing parameters gets $\mathit R_{ {{\mathit K}} {{\mathit \pi}} {{\mathit \pi}^{0}} }$ = $0.84$ $\pm0.07$.

References:

ABLIKIM 2021AA JHEP 2105 164 Measurement of the $D \to K^-\pi^+\pi^+\pi^-$ and $D \to K^-\pi^+\pi^0$ coherence factors and average strong-phase differences in quantum-correlated ${D\bar{D}}$ decays EVANS 2016 PL B757 520 Improved Determination of the ${{\mathit D}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Coherence Factor and Associated Hadronic Parameters from a Combination of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \psi}{(3770)}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ and ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}{{\mathit X}}$ Data Also PL B765 402 (errat.) Improved Determination of the ${{\mathit D}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Coherence Factor and Associated Hadronic Parameters from a Combination of ${{\mathit e}^{+}}$ ${{\mathit e}^{-}}$ $\rightarrow$ ${{\mathit \psi}{(3770)}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}$ and ${{\mathit p}}$ ${{\mathit p}}$ $\rightarrow$ ${{\mathit c}}{{\overline{\mathit c}}}{{\mathit X}}$ data LIBBY 2014 PL B731 197 New Determination of the ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{0}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Coherence Factors and Average Strong-Phase Differences LOWREY 2009 PR D80 031105 Determination of the ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{0}}$ and ${{\mathit D}^{0}}$ $\rightarrow$ ${{\mathit K}^{-}}{{\mathit \pi}^{+}}{{\mathit \pi}^{+}}{{\mathit \pi}^{-}}$ Coherence Factors and Average Strong-Phase Differences using Quantum-Correlated Measurements