Measurement of the $CP$-even fraction of $D^0\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$

Abstract

A determination of the $CP$-even fraction $F_{+}$ in the decay $D^0\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ is presented. Using $2.93$ fb${}^{-1}$ of $e^{+}{e}^{-}\to \psi (3770)\to D\bar{D}$ data collected by the BESIII detector, one charm meson is reconstructed in the signal mode and the other in a $CP$ eigenstate or the decay $D\to K_{S,L}^0{\pi }^{+}{\pi }^{-}$. Analysis of the relative rates of these double-tagged events yields the result $F_{+}=0.730\pm 0.037\pm 0.021$, where the first uncertainty is statistical and the second is systematic. This is the first model-independent measurement of $F_{+}$ in $D^0\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ decays.

arXiv comment13 pages, 5 figures

References in corpus (20)

• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• sPlot: a statistical tool to unfold data distributions
• Future Physics Programme of BESIII
• Decay Chain Fitting with a Kalman Filter
• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2018
• Model-independent determination of the strong-phase difference between D^0 and D^0-bar-> K^0_S,L h^+ h^- (h=pi,K) and its impact on the measurement of the CKM angle gamma/phi_3
• The ultimate theoretical error on gamma from B -> D K decays
• 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 $D\to K^{+}{K}^{-}{\pi }^0$
• Model-independent determination of the relative strong-phase difference between $D^0$ and ${\bar{D}}^0\to K_{S,L}^0{\pi }^{+}{\pi }^{-}$ and its impact on the measurement of the CKM angle $\gamma /{\varphi }_3$
• First determination of the CP content of D->pi+pi-pi0 and D->K+K-pi0
• Measurement of e+e- --> D Dbar Cross Sections at the psi(3770) Resonance
• Improved model-independent determination of the strong-phase difference between $D^0$ and ${\bar{D}}^0\to K_{\mathrm{S},\mathrm{L}}^0{K}^{+}{K}^{-}$ decays
• Search for $CP$ violation through an amplitude analysis of $D^0\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ decays
• Model-independent determination of the strong phase difference between $D^0$ and ${\bar{D}}^0\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$ amplitudes
• Quantum-correlated measurements of $D\to K_{\mathrm{S}}^0{\pi }^{+}{\pi }^{-}{\pi }^0$ decays and consequences for the determination of the CKM angle $\gamma$
• Improved measurement of the strong-phase difference ${\delta }_D^{K\pi }$ in quantum-correlated $D\bar{D}$ decays
• 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
• Measurement of the $CP$-even fraction of $D^0\to {\pi }^{+}{\pi }^{-}{\pi }^{+}{\pi }^{-}$
• Measuring $CP$ violation and mixing in charm with inclusive self-conjugate multibody decay modes

Cited by in corpus (1)

• Measurement of the strong-phase difference between $D^0$ and $\overline{D^0}\to K^{+}{K}^{-}{\pi }^{+}{\pi }^{-}$ in bins of phase space