New Measurements of Cabibbo-Suppressed Decays of D Mesons in CLEO-c

Abstract

Using 281 pb^-1 of data collected with the CLEO-c detector, we report on first observations and new measurements of Cabibbo-suppressed decays of D mesons to 2, 3, 4, and 5 pions. Branching fractions of previously unobserved modes are measured to be: B(D^0\to pi^+pi^-pi^0pi^0)=(9.9\pm0.6\pm0.7\pm0.2\pm0.1)x10^-3, B(D^0\toπ^+π^+π^-π^-π^0)=(4.1\pm0.5\pm0.2\pm0.1\pm0.0)x10^-3, B(D^+\toπ^+π^0π^0)=(4.8\pm0.3\pm0.3\pm0.2)x10^-3, B(D^+\toπ^+π^+π^-π^0)=(11.6\pm0.4\pm0.6\pm0.4)x10^-3, B(D^0\toηπ^0)=(0.62\pm0.14\pm0.05\pm0.01\pm0.01)x10^-3, and B(D^0\toωπ^+π^-)=(1.7\pm0.5\pm0.2\pm0.0\pm0.0)x10^-3. The uncertainties are from statistics, experimental systematics, normalization and CP correlations (for D^0 modes only). Improvements in other multi-pion decay modes are also presented. The D-->pi pi rates allow us to extract the ratio of isospin amplitudes A(Delta I=3/2)/A(ΔI=1/2)=0.420\pm0.014(stat)\pm0.016(syst) and the strong phase shift of delta_I=(86.4+-2.8+-3.3) degrees, which is quite large and now more precisely determined.

9 pages postscript also available through http://www.lns.cornell.edu/public/CLNS/2005/, submitted to PRL

Cited by in corpus (22)

• The Physics of the B Factories
• Charm Meson Decays
• 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
• Enhancement of charm CP violation due to nearby resonances
• Search for the Decay D0 -> gamma gamma and Measurement of the Branching Fraction for D0 -> pi0 pi0
• Dalitz Plot Analysis of the D+ --> pi- pi+ pi+ Decay
• Contributions to the width difference in the neutral $D$ system from hadronic decays
• Study of the D^0 \to pi^-pi^+pi^-pi^+ decay
• Isospin analysis of D0 decay to three pions
• An Investigation of D+--> tau+ nu
• Hadronic D and D_s Meson Decays
• Charm Physics with BES-III at BEPC-II
• Observation of the Singly Cabibbo-Suppressed Decay $D^{+}\to \omega {\pi }^{+}$ and Evidence for $D^0\to \omega {\pi }^0$
• Measurement of the ratio B(D0->pi+pi-pi0)/B(D0->K-pi+pi0) and the time-integrated CP asymmetry in D0->pi+pi-pi0
• Measurement of the D+ --> pi+ pi0 and D+ --> K+ pi0 Branching Fractions
• Precise Branching Ratio Measurements of the Decays D0-->pi- pi+ pi0 and D0-->K- K+ pi0
• Absolute Branching Fractions of Cabibbo-Suppressed D --> K Kbar Decays
• Branching Fraction for the Doubly-Cabibbo-Suppressed Decay D^+ --> K^+ pi^0
• 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 $\eta \eta \eta$
• Charm Hadronic Decay Branching Fractions From CLEO-c
• Measurement of Singly Cabibbo-Suppressed Decays $D\to \omega \pi \pi$