Measurement of the Decay Constant $f_D{_S^+}$ using $D_S^+ --> ell^+ nu
High Energy Physics - Experiment
2010-04-08 v3 High Energy Physics - Lattice
High Energy Physics - Phenomenology
Abstract
We measure the decay constant fDs using the Ds -> l+ nu channel, where the l+ designates either a mu+ or a tau+, when the tau+ -> pi+ nu. Using both measurements we find fDs = 274 +-13 +- 7 MeV. Combining with our previous determination of fD+, we compute the ratio fDs/fD+ = 1.23 +- 0.11 +- 0.04. We compare with theoretical estimates.
Keywords
Cite
@article{arxiv.0704.0629,
title = {Measurement of the Decay Constant $f_D{_S^+}$ using $D_S^+ --> ell^+ nu},
author = {CLEO Collaboration and M. Artuso},
journal= {arXiv preprint arXiv:0704.0629},
year = {2010}
}
Comments
6 pages postscript,also available through http://www.lns.cornell.edu/public/CLNS/2007/