Measurement of Branching Fractions of Color-Suppressed Decays of the B0bar Meson to D0 pi0, D0 eta, and D0 omega

TL;DR

This paper presents experimental measurements of branching fractions for specific color-suppressed B0 meson decays, revealing larger values than theoretical predictions, based on data from the BaBar detector.

Contribution

First precise measurements of branching fractions for B0 decays to D0 pi0, D0 eta, and D0 omega, challenging existing theoretical models.

Findings

Branching fractions are significantly larger than theoretical expectations.

Measured values: B(B0 -> D0 pi0) ≈ 2.89e-4, B(B0 -> D0 eta) ≈ 2.41e-4, B(B0 -> D0 omega) ≈ 2.48e-4.

Data collected from 48.8 million B B-bar pairs.

Abstract

We report preliminary results of an experimental investigation of the color-suppressed decays bar{B^0} --> D^0 pi^0, D^0 eta, and D^0 omega. We measure the branching fractions B (bar{B^0} --> D^0 pi^0) = (2.89 +/- 0.29 (stat.) +/- 0.38 (syst.)) times 10^{-4}, B (\bar{B^0} \to D^0 \eta) = (2.41 \pm 0.39 (stat.) +/- 0.32 (syst.)) times 10^{-4}, and B (bar{B^0} --> D^0 omega) = (2.48 +/- 0.40 (stat.) +/- 0.32 (syst.)) times 10^{-4}. The results are based on (48.8 +/- 0.5) times 10^6 B B-bar pairs collected with the BaBar detector. The branching fractions of these color-suppressed decays are significantly larger than theoretical expectations based upon factorization.