English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Plus

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Zendy Tools

Zendy Open

Quantum-correlated $\psi(3770) \to D\bar{D}$ decays collected by the CLEO-cexperiment are used to perform a first measurement of $F_+^{4\pi}$, thefractional $CP$-even content of the self-conjugate decay $D \to\pi^+\pi^-\pi^+\pi^-$, obtaining a value of $0.737 \pm 0.028$. An importantinput to the measurement comes from the use of $D \to K^0_{\rm S}\pi^+\pi^-$and $D \to K^0_{\rm L}\pi^+\pi^-$ decays to tag the signal mode. This sametechnique is applied to the channels $D \to\pi^+\pi^-\pi^0$ and $D \toK^+K^-\pi^0$, yielding $F_+^{\pi\pi\pi^0} = 1.014 \pm 0.045 \pm 0.022$ and$F_+^{KK\pi^0} = 0.734 \pm 0.106 \pm 0.054$, where the first uncertainty isstatistical and the second systematic. These measurements are consistent withthose of an earlier analysis, based on $CP$-eigenstate tags, and can becombined to give values of $F_+^{\pi\pi\pi^0} = 0.973 \pm 0.017$ and$F_+^{KK\pi^0} = 0.732 \pm 0.055$. The results will enable the three modes tobe included in a model-independent manner in measurements of the unitaritytriangle angle $\gamma$ using $B^\mp \to DK^\mp$ decays, and in time-dependentstudies of $CP$ violation and mixing in the $D\bar{D}$ system.

physics letters b

First determination of the $CP$ content of $D \to \pi^+\pi^-\pi^+\pi^-$  and updated determination of the $CP$ contents of $D \to \pi^+\pi^-\pi^0$ and  $D \to K^+K^-\pi^0$