Improved Measurement of the Pseudoscalar Decay Constant $f_{D_{s}}$
High Energy Physics - Experiment
2010-04-08 v2
Abstract
We present a new determination of the Ds decay constant, f_{Ds} using 5 million continuum charm events obtained with the CLEO II detector. Our value is derived from our new measured ratio of widths for Ds -> mu nu/Ds -> phi pi of 0.173+/- 0.021 +/- 0.031. Taking the branching ratio for Ds -> phi pi as (3.6 +/- 0.9)% from the PDG, we extract f_{Ds} = (280 +/- 17 +/- 25 +/- 34){MeV}. We compare this result with various model calculations.
Cite
@article{arxiv.hep-ex/9712014,
title = {Improved Measurement of the Pseudoscalar Decay Constant $f_{D_{s}}$},
author = {CLEO Collaboration and M. Chadha et al},
journal= {arXiv preprint arXiv:hep-ex/9712014},
year = {2010}
}
Comments
23 page postscript file, postscript file also available through http://w4.lns.cornell.edu/public/CLNS