Measurement of Absolute Hadronic Branching Fractions of D_s Mesons

TL;DR

This paper presents preliminary measurements of absolute hadronic branching fractions of D_s mesons using a double tag technique at 4.17 GeV, providing key data for understanding D_s decays and addressing measurement challenges.

Contribution

It introduces a new measurement of D_s meson branching fractions using a double tag method at a specific energy, improving accuracy and addressing previous measurement issues.

Findings

Measured absolute branching fractions for multiple D_s+ decay modes.

Identified and discussed challenges in measuring the D_s+ to phi pi+ decay.

Provided a new branching fraction measurement useful as a reference mode.

Abstract

We report preliminary measurements of absolute hadronic branching fractions of Ds mesons determined using a double tag technique. These measurements are from 195 pb^{-1} of e+e- collisions recorded at center of mass energies near 4.17 GeV with the CLEO-c detector at CESR. We obtain absolute branching fractions for Ds+ decays to KS0 K+, K- K+ pi+, K- K+ pi+ pi-, pi+ pi+ pi-, pi+ eta, and pi+ etaprime. We discuss the problems inherent in measuring accurately the branching fraction for Ds+ to phi pi+, which is often used as a reference mode for measurement of other Ds+ branching fractions, and provide a measurement of a branching fraction that may be useful for this purpose.