Amplitude Analysis of the decay D^0 --> K^- K^+ pi^0

Details Amplitude Analysis of the decay D^0 --> K^- K^+ pi^0 Amplitude Analysis of the decay D^0 --> K^- K^+ pi^0

2007-04-26

arxiv.org/abs/0704.3593v2

Phys.Rev.D76:011102,2007

Physics

High Energy Physics

High Energy Physics - Experiment

8 pages, 10 postscript figues, submitted to Physical Review D (Rapid Communications)

Scientific paper

10.1103/PhysRevD.76.011102

Using 385 fb^-1 of e^+e^- collisions at the CM energies of around 10.6 GeV recorded by the BaBar experiment, we study the amplitudes of the singly Cabibbo-suppressed decay D^0 --> K^- K^+ pi^0. We measure the strong phase difference between the D0bar and D0 decays to the K^*(892)^+ K^- state to be -35.5 +/- 1.9 (stat) +/- 2.2 (syst) degrees, and their amplitude ratio to be 0.599 +/- 0.013 (stat) +/- 0.011 (syst). We observe significant contributions from the Kpi and K^-K^+ scalar and vector amplitudes, and analyze the moments of the cosine of the helicity angle in these systems. We find no evidence for charged, scalar kappa(800) state, nor for higher spin states. We also perform a model-independent partial wave analysis of the K^-K^+ system in a limited mass range around 1 GeV/c^2. We study several models for Kpi S-wave amplitude, and describe which one is favored by our data.

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