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

Abstract

Based on 2.93 fb${}^{-1}$ $e^{+}{e}^{-}$ collision data taken at center-of-mass energy of 3.773 GeV by the BESIII detector, we report searches for the singly Cabibbo-suppressed decays $D^{+}\to \omega {\pi }^{+}$ and $D^0\to \omega {\pi }^0$. A double tag technique is used to measure the absolute branching fractions $\mathcal{B}(D^{+}\to \omega {\pi }^{+})=(2.79\pm 0.57\pm 0.16)\times 10^{-4}$ and $\mathcal{B}(D^0\to \omega {\pi }^0)=(1.17\pm 0.34\pm 0.07)\times 10^{-4}$, with statistical significances of $5.5\sigma$ and $4.1\sigma$, respectively. We also present measurements of the absolute branching fractions for the related $\eta \pi$ decay modes. We find $\mathcal{B}(D^{+}\to \eta {\pi }^{+})=(3.07\pm 0.22\pm 0.13)\times 10^{-3}$ and $\mathcal{B}(D^0\to \eta {\pi }^0)=(0.65\pm 0.09\pm 0.04)\times 10^{-3}$, which are consistent with the current world averages. The first and second uncertainties are statistical and systematic, respectively.

References in corpus (11)

• 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
• Measurement of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}$ Cross Section between 600 and 900 MeV Using Initial State Radiation
• Two-body hadronic charmed meson decays
• SU(3) Sum Rules for Charm Decay
• Measurement of Absolute Hadronic Branching Fractions of D Mesons and e^+e^- --> D barD Cross Sections at E_cm = 3773 MeV
• Measurements of D Meson Decays to Two Pseudoscalar Mesons
• Determination of the D0 -> K+pi- Relative Strong Phase Using Quantum-Correlated Measurements in e+e- -> D0 D0bar at CLEO
• New Measurements of Cabibbo-Suppressed Decays of D Mesons in CLEO-c
• Measurement of $y_{CP}$ in $D^0-{\overline{D}}^0$ oscillation using quantum correlations in $e^{+}{e}^{-}\to D^0{\overline{D}}^0$ at $\sqrt{s}$ = 3.773\,GeV

Cited by in corpus (9)

• Flavor & new physics opportunities with rare charm decays into leptons
• Study of the Standard Model with weak decays of charmed hadrons at BESIII
• A global analysis of two-body D to VP decays within the framework of flavor symmetry
• $K_S^0-K_L^0$ asymmetries in $D$-meson decays
• Study of $\mathbf{D}\to {\mathbf{a}}_0(980){\mathbf{e}}^{+}{\mathbf{\nu }}_{\mathbf{e}}$ decay in the light-cone sum rules approach
• Search for heavy Majorana neutrino in lepton number violating decays of D-> K pi e+ e+
• Branching fractions and polarizations of $D\to V(\omega ,\rho ,K^{\ast })\ell {\nu }_{\ell }$ within QCD LCSR
• First measurement of polarizations in the decay $D^0\to \omega \varphi$
• Measurements of the Branching Fractions of the Singly-Cabibbo-Suppressed Decays $D^0\to \omega \eta$, ${\eta }^{(\prime )}{\pi }^0$ and ${\eta }^{(\prime )}\eta$