Measurement of the Ratios of Branching Fractions B(Bs -> Ds pi pi pi) / B(Bd -> Dd pi pi pi) and B(Bs -> Ds pi) / B(Bd -> Dd pi)

TL;DR

This paper reports the first measurement of the ratio of branching fractions for Bs and Bd meson decays involving D and pi mesons, using data from the Fermilab Tevatron, and updates previous measurements with improved precision.

Contribution

It provides the first measurement of B(Bs -> Ds pi pi pi) / B(Bd -> Dd pi pi pi) and improves the precision of B(Bs -> Ds pi) / B(Bd -> Dd pi) ratios.

Findings

First measurement of B(Bs -> Ds pi pi pi) / B(Bd -> Dd pi pi pi)

Updated measurement of B(Bs -> Ds pi) / B(Bd -> Dd pi) with reduced uncertainty

Measured branching fractions for Bs decays involving Ds and multiple pions

Abstract

Using 355 pb^-1 of data collected by the CDF II detector in \ppbar collisions at sqrt{s} = 1.96 TeV at the Fermilab Tevatron, we study the fully reconstructed hadronic decays B -> D pi and B -> D pi pi pi. We present the first measurement of the ratio of branching fractions B(Bs -> Ds pi pi pi) / B(Bd -> Dd pi pi pi) = 1.05 pm 0.10 (stat) pm 0.22 (syst). We also update our measurement of B(Bs -> Ds pi) / B(Bd -> Dd pi) to 1.13 pm 0.08 (stat) pm 0.23 (syst) improving the statistical uncertainty by more than a factor of two. We find B(Bs -> Ds pi) = [3.8 pm 0.3 (stat) pm 1.3 (syst)] \times 10^{-3} and B(Bs -> Ds pi pi pi) = [8.4 pm 0.8 (stat) pm 3.2 (syst)] \times 10^{-3}.