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

TL;DR

This paper presents a precise measurement of the ratio of branching fractions for D0 decays to pi+pi-pi0 and K-pi+pi0, along with a search for CP violation, finding no significant asymmetry.

Contribution

It provides a high-precision measurement of the relative branching fraction and CP asymmetry in D0 decays using a large data sample, improving the accuracy of previous results.

Findings

Measured B(D0->pi+pi-pi0)/B(D0->K-pi+pi0) = (10.12 +/- 0.04(stat) +/- 0.18(syst))%

CP asymmetry in D0->pi+pi-pi0 decay is (0.43 +/- 1.30)%

No significant CP violation observed in the decay channel.

Abstract

We report a high-statistics measurement of the relative branching fraction B(D0->pi+pi-pi0)/B(D0->K-pi+pi0) using a 532 fb^{-1} data sample collected with the Belle detector at the KEKB asymmetric-energy e+e- collider. The measured value of the relative branching fraction is B(D0->pi+pi-pi0)/B(D0->K-pi+pi0) = (10.12 +/- 0.04(stat) +/- 0.18(syst))x10^{-2} which has an accuracy comparable to the world average. We also present a measurement of the time-integrated CP asymmetry in D0->pi+pi-pi0 decay. The result, A_{CP} = (0.43 +/- 1.30)%, shows no significant CP violation.