Observation of the Doubly Cabibbo-Suppressed Decay $D^{+}\to K^{+}{\pi }^{+}{\pi }^{-}{\pi }^0$ and Evidence for $D^{+}\to K^{+}\omega$

Abstract

Using $2.93\mathrm{f}{\mathrm{b}}^{-1}$ of $e^{+}{e}^{-}$ collision data collected at a center-of-mass energy of 3.773 GeV with the BESIII detector, the first observation of the doubly Cabibbo-suppressed decay $D^{+}\to K^{+}{\pi }^{+}{\pi }^{-}{\pi }^0$ is reported. After removing decays that contain narrow intermediate resonances, including $D^{+}\to K^{+}\eta$, $D^{+}\to K^{+}\omega$, and $D^{+}\to K^{+}\varphi$, the branching fraction of the decay $D^{+}\to K^{+}{\pi }^{+}{\pi }^{-}{\pi }^0$ is measured to be $(1.13\pm 0.08_{\mathrm{stat}}\pm 0.03_{\mathrm{syst}})\times 10^{-3}$. The ratio of branching fractions of $D^{+}\to K^{+}{\pi }^{+}{\pi }^{-}{\pi }^0$ over $D^{+}\to K^{-}{\pi }^{+}{\pi }^{+}{\pi }^0$ is found to be $(1.81\pm 0.15)$\%, which corresponds to $(6.28\pm 0.52){\tan }^4{\theta }_C$, where ${\theta }_C$ is the Cabibbo mixing angle. This ratio is significantly larger than the corresponding ratios for other doubly Cabibbo-suppressed decays. The asymmetry of the branching fractions of charge-conjugated decays $D^{\pm }\to K^{\pm }{\pi }^{\pm }{\pi }^{\mp }{\pi }^0$ is also determined, and no evidence of $CP$ violation is found. In addition, the first evidence of the $D^{+}\to K^{+}\omega$ decay, with a statistical significance of 3.3$\sigma$, is presented and its decay branching fraction is determined to be $({5.7_{-2.1}^{+2.5}}_{\mathrm{stat}}\pm 0.2_{\mathrm{syst}})\times 10^{-5}$.

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• Design and Construction of the BESIII Detector
• The Precision Monte Carlo Event Generator KK For Two-Fermion Final States In e+e- Collisions
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Future Physics Programme of BESIII
• Observation of $CP$ violation in charm decays
• Measurement of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}$ Cross Section between 600 and 900 MeV Using Initial State Radiation
• Branching ratios and direct CP asymmetries in $D\to PP$ decays
• Two-body hadronic charmed meson decays
• Measurement of Absolute Hadronic Branching Fractions of D Mesons and e^+ e^- --> D D-bar Cross Sections at the psi(3770)
• SU(3) symmetry breaking and CP violation in D -> PP decays
• SU(3) Sum Rules for Charm Decay
• Branching ratios and direct CP asymmetries in $D\to PV$ decays
• A global analysis of two-body D to VP decays within the framework of flavor symmetry
• Measurement of the Branching Fraction For the Semi-Leptonic Decays $D^{0(+)}\to {\pi }^{-(0)}{\mu }^{+}{\nu }_{\mu }$ and Test of Lepton Flavor Universality
• Nonleptonic two-body decays of charmed mesons
• Improved measurement of the absolute branching fraction of $D^{+}\to {\bar{K}}^0{\mu }^{+}{\nu }_{\mu }$
• Measurement of the absolute branching fraction of $D^{+}\to {\bar{K}}^0{e}^{+}{\nu }_e$ via ${\bar{K}}^0\to {\pi }^0{\pi }^0$
• Charm CPV: observation and prospects
• Measurement of e+e- --> D Dbar Cross Sections at the psi(3770) Resonance
• Observation of the Semileptonic $D^{+}$ Transition into an Axial-Vector Meson ${\bar{K}}_1(1270{)}^0$
• Observation of $D^{+}\to \eta \eta {\pi }^{+}$ and improved measurement of $D^{0(+)}\to \eta {\pi }^{+}{\pi }^{-(0)}$
• First Observation of $D^{+}\to \eta {\mu }^{+}{\nu }_{\mu }$ and Measurement of its Decay Dynamics
• Observation of the semi-muonic decay $D^{+}\to \omega {\mu }^{+}{\nu }_{\mu }$
• Puzzles in Hyperon, Charm and Beauty Physics
• Measurement of exclusive D meson decays to eta and eta' final states and SU(3) amplitude analysis
• Observation of the Doubly Cabibbo-Suppressed Decay $D_s^{+}\to K^{+}{K}^{+}{\pi }^{-}$
• A U-spin prediction for the CP-forbidden transition $e^{+}{e}^{-}\to D^0{\bar{D}}^0\to (K^{+}{K}^{-}{)}_D({\pi }^{+}{\pi }^{-}{)}_D$
• Observation of ${\eta }_c\to \omega \omega$ in $J/\psi \to \gamma \omega \omega$

Cited by in corpus (9)

• Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021
• Search for the semileptonic decay $D^{0(+)}\to b_1(1235{)}^{-(0)}{e}^{+}{\nu }_e$
• Search for baryon and lepton number violating decays $D^0\to \bar{p}{e}^{+}$ and $D^0\to p{e}^{-}$
• Determination of the absolute branching fractions of $D^0\to K^{-}{e}^{+}{\nu }_e$ and $D^{+}\to {\bar{K}}^0{e}^{+}{\nu }_e$
• Observation of the Decay $D^0\to {\rho }^{-}{\mu }^{+}{\nu }_{\mu }$
• Observation of $D^{0(+)}\to K_S^0{\pi }^{0(+)}\omega$ and improved measurement of $D^0\to K^{-}{\pi }^{+}\omega$
• Determination of the $CP$-even fraction of $D^0\to K_S^0{\pi }^{+}{\pi }^{-}{\pi }^0$
• Measurement of the branching fractions for Cabibbo-suppressed decays $D^{+}\to K^{+}{K}^{-}{\pi }^{+}{\pi }^0$ and $D_{(s)}^{+}\to K^{+}{\pi }^{-}{\pi }^{+}{\pi }^0$ at Belle
• Study of the doubly Cabibbo-suppressed decays $D_s^{+}\to K^{+}{K}^{+}{\pi }^{-}$ and $D_s^{+}\to K^{+}{K}^{+}{\pi }^{-}{\pi }^0$