Measurement of Ds+ and Ds*+ Production in B Meson Decays and from Continuum e+e- Annihilation at sqrt{s}=10.6 GeV

TL;DR

This paper reports precise measurements of Ds+ and Ds*+ meson production rates from B decays and continuum events at 10.6 GeV, providing insights into B meson decay mechanisms and meson production dynamics.

Contribution

It presents new, detailed measurements of Ds+ and Ds*+ production rates from B decays and continuum events, including their branching fractions and momentum spectra, at the Y(4S) resonance.

Findings

BR(B --> Ds+ X) = (10.93±0.19±0.58±2.73)%

BR(B --> Ds*+ X) = (7.9±0.8±0.7±2.0)%

SumBR(B --> Ds(*)+ Dbar(*)) = (5.07±0.14±0.30±1.27)%

Abstract

New measurements of Ds+ and Ds*+ meson production rates from B decays and from qqbar continuum events near the Y(4S) resonance are presented. Using 20.8 fb-1 of data on the Y(4S) resonance and 2.6 fb-1 off resonance, we find the inclusive branching fractions BR(B --> Ds+ X) = (10.93+/-0.19+/-0.58+/-2.73)% and BR(B --> Ds*+ X) = (7.9+/-0.8+/-0.7+/-2.0)%, where the first error is statistical, the second is systematic, and the third is due to the Ds+ --> phi pi+ branching fraction uncertainty. The branching fractions SumBR(B --> Ds(*)+ Dbar(*)) = (5.07+/-0.14+/-0.30+/-1.27)% and SumBR(B --> Ds*+ Dbar(*)) = (4.1+/-0.2+/-0.4+/-1.0)% are determined from the Ds(*)+ momentum spectra.