Measurement of the absolute branching fraction of the Ds+- meson

TL;DR

This paper reports a precise measurement of the absolute branching fraction of the Ds+- meson decaying into K+-K-+pi+- using data from the Belle detector at KEKB, providing key insights into charm meson decay properties.

Contribution

The study introduces a novel measurement technique using yield ratios of fully reconstructed Ds* and Ds1 events to determine the absolute branching fraction.

Findings

Br(Ds+- -> K+-K-+pi+-) = (4.0 +- 0.4 (stat) +- 0.4 (sys))%

First precise measurement of this branching fraction at Belle

Provides data for testing charm decay models

Abstract

The Ds+- -> K+-K-+pi+- absolute branching fraction is measured using e+e- -> Ds*+- Ds1-+(2536) events collected by the Belle detector at the KEKB e+e- asymmetric energy collider. Using the ratio of yields when either the Ds1 or Ds* is fully reconstructed, we find Br(Ds+- -> K+-K-+pi+-)= (4.0+-0.4(stat)+-0.4(sys))%.