Absolute Measurement of Hadronic Branching Fractions of the D_s^+ Meson

TL;DR

This paper reports precise measurements of the absolute branching fractions of eight D_s^+ meson decays using a double tag technique on e+ e- collision data at 4.17 GeV, providing essential normalization for charm quark studies.

Contribution

First measurement of absolute branching fractions for multiple D_s^+ decay modes at this energy using a double tag method.

Findings

Measured B(D_s -> K- K+ pi+) = (5.50 +- 0.23 +- 0.16)%

Provided partial branching fractions for kinematic subsets

Enhanced normalization accuracy for charm quark processes

Abstract

The branching fractions of D_s meson decays serve to normalize many measurements of processes involving charm quarks. Using 298 /pb of e+ e- collisions recorded at a center of mass energy of 4.17 GeV, we determine absolute branching fractions for eight D_s decays with a double tag technique. In particular we determine the branching fraction B(D_s -> K- K+ pi+) = (5.50 +- 0.23 +- 0.16)%, where the uncertainties are statistical and systematic respectively. We also provide partial branching fractions for kinematic subsets of the K- K+ pi+ decay mode.