Measurement of Singly Cabibbo-Suppressed Decays $D\to \omega \pi \pi$

Abstract

Using 2.93 fb${}^{-1}$ of $e^{+}{e}^{-}$ collision data taken at a center-of-mass energy of 3.773 GeV by the BESIII detector at the BEPCII, we measure the branching fractions of the singly Cabibbo-suppressed decays $D\to \omega \pi \pi$ to be $\mathcal{B}(D^0\to \omega {\pi }^{+}{\pi }^{-})=(1.33\pm 0.16\pm 0.12)\times 10^{-3}$ and $\mathcal{B}(D^{+}\to \omega {\pi }^{+}{\pi }^0)=(3.87\pm 0.83\pm 0.25)\times 10^{-3}$, where the first uncertainties are statistical and the second ones systematic. The statistical significances are $12.9\sigma$ and $7.7\sigma$, respectively. The precision of $\mathcal{B}(D^0\to \omega {\pi }^{+}{\pi }^{-})$ is improved by a factor of 2.1 over the CLEO measurement, and $\mathcal{B}(D^{+}\to \omega {\pi }^{+}{\pi }^0)$ is measured for the first time. No significant signal of $\mathcal{B}(D^0\to \omega {\pi }^0{\pi }^0)$ is observed, and the upper limit on the branching fraction is $\mathcal{B}(D^0\to \omega {\pi }^0{\pi }^0)<1.10\times 10^{-3}$ at the $90\%$ confidence level. The branching fractions of $D\to \eta \pi \pi$ are also measured and consistent with existing results.

arXiv comment11 pages, 5 figures and 4 tables

References in corpus (18)

• Design and Construction of the BESIII Detector
• Coherent Exclusive Exponentiation For Precision Monte Carlo Calculations
• Future Physics Programme of BESIII
• Enhanced CP Violation with $B\to K{D}^0({\overline{D}}^0)$ Modes and Extraction of the CKM Angle gamma
• Kernel Estimation in High-Energy Physics
• Determining $\gamma$ using $B^{\pm }\to D{K}^{\pm }$ with multibody D decays
• Measurement of the ${\mathrm{e}}^{+}{\mathrm{e}}^{-}\to {\pi }^{+}{\pi }^{-}$ Cross Section between 600 and 900 MeV Using Initial State Radiation
• Improved Methods for Observing CP Violation in B+/- --> K+/- D0 and Measuring the CKM Phase gamma
• Measurement of $\mathcal{R}(D)$ and $\mathcal{R}(D^{\ast })$ with a semileptonic tagging method
• Improved measurement of the absolute branching fraction of $D^{+}\to {\bar{K}}^0{\mu }^{+}{\nu }_{\mu }$
• Improved determination of the $D\to K^{-}{\pi }^{+}{\pi }^{+}{\pi }^{-}$ coherence factor and associated hadronic parameters from a combination of $e^{+}{e}^{-}\to \psi (3770)\to c\bar{c}$ and $pp\to c\bar{c}X$ data
• Contributions to the width difference in the neutral $D$ system from hadronic decays
• New Measurements of Cabibbo-Suppressed Decays of D Mesons in CLEO-c
• Observation of $D^{+}\to \eta \eta {\pi }^{+}$ and improved measurement of $D^{0(+)}\to \eta {\pi }^{+}{\pi }^{-(0)}$
• Measurements of absolute branching fractions for $D$ mesons decays into two pseudoscalar mesons
• Search for invisible decays of $\omega$ and $\varphi$ with $J/\psi$ data at BESIII
• $D_s$ Inclusive Decays
• Measurement of Singly Cabibbo-Suppressed Decays $D^0\to {\pi }^0{\pi }^0{\pi }^0$, ${\pi }^0{\pi }^0\eta$, ${\pi }^0\eta \eta$ and $\eta \eta \eta$