A Dalitz Plot Analysis of D0 -> pi+ pi- pi0 Decays in CLEO II.V

TL;DR

This paper analyzes the resonant substructure of the D0 -> pi+ pi- pi0 decay using a Dalitz plot, identifying key resonances and measuring amplitudes, phases, and CP violation with data from the CLEO II.V detector.

Contribution

It provides the first detailed Dalitz plot analysis of this decay mode, identifying dominant resonances and measuring their properties.

Findings

Significant contributions from rho resonances and non-resonant channels

No evidence of sigma(500) or higher rho resonances

No observable CP violation in the decay

Abstract

Using the 9 inverse femtobarn data sample collected with the CLEO II.V detector at the Cornell Electron Storage Ring, we have studied the resonant substructure of the Cabibbo suppressed decay D0 -> pi+ pi- pi0. We observe significant contributions from the rho- pi+, rho+ pi-, rho0 pi0, and non-resonant channels, and present preliminary results of the amplitudes, phases, and fit fractions for these sub-modes. No evidence for the sigma(500) or more massive rho resonances was found. We observe no CP violation, finding Acp = 0.01 +0.09 -0.07 +- 0.09.