Precise Branching Ratio Measurements of the Decays D0-->pi- pi+ pi0 and D0-->K- K+ pi0

Abstract

Using 232 fb-1 of e+e- collision data recorded by the BaBar experiment, we measure the ratios of three-body Cabibbo-suppressed decay rates of the D^0 meson relative to that of the Cabibbo-favored decay: B(D0 --> pi- pi+ pi0)/ B(D0 --> K- pi+ pi0) = (10.59 +/- 0.06 +/- 0.13).10^{-2} and B(D0 --> K- K+ pi0)/ B(D0 --> K- pi+ pi0) = (2.37 +/- 0.03 +/- 0.04). 10^{-2}, where the errors are statistical and systematic respectively. The precisions of these measurements are significantly better than those of the current world average values.We note that the second result differs significantly from the current world average value. Using the PDG-2006 value for D0 --> K- pi+ pi0 branching fraction, we obtain, B(D0 --> pi- pi+ pi0) = (1.493 +/- 0.008 +/- 0.018 +/- 0.053). 10^{-2}, B(D0 --> K- K+ pi0) = (0.334 +/- 0.004 +/- 0.006 +/- 0.012). 10^{-2}, where the errors are statistical, systematic, and due to the uncertainty of B(D0 --> K- pi+ pi0). The average squared matrix elements for both of the singly Cabibbo-suppressed decays are roughly a factor of sin^2 θ_C smaller than that for the Cabibbo-favored decay and are therefore, in contrast to the corresponding two-body modes, consistent with the naive expectations.

7 pages, 5 postscript figues, submitted to Phys. Rev. D (Rapid Communications)

References in corpus (4)

• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• The Cosmological Parameters 2006
• Measurement of Interfering K^*+K^- and K^*-K^+ Amplitudes in the Decay D^0 --> K^+K^-pi^0
• New Measurements of Cabibbo-Suppressed Decays of D Mesons in CLEO-c

Cited by in corpus (9)

• Charm Meson Decays
• Effects of S-wave thresholds
• Search for CP Violation in Neutral D Meson Cabibbo-suppressed Three-body Decays
• Measurement of ${CP}\xspace$ Violation Parameters with a Dalitz Plot Analysis of $B^{\pm }\to D_{{\pi }^{+}{\pi }^{-}{\pi }^0}{K}^{\pm }$
• Amplitude Analysis of the decay D^0 --> K^- K^+ pi^0
• Isospin analysis of D0 decay to three pions
• Measurement of the neutral $D$ meson mixing parameters in a time-dependent amplitude analysis of the $D^0\to {\pi }^{+}{\pi }^{-}{\pi }^0$ decay
• 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
• CP-violation parameters from decay rates of $B^{\pm }\to D{K}^{\pm }$, $D\to$ multibody final states