Measurement of the Ds Lifetime
High Energy Physics - Experiment
2008-11-26 v1
Abstract
We report the results of a precise measurement of the Ds meson lifetime based on 1662 +/- 56 fully reconstructed Ds -> phi pi decays, from the charm hadroproduction experiment E791 at Fermilab. Using an unbinned maximum likelihood fit, we measure the Ds lifetime to be 0.518 +/- 0.014 +/- 0.007 ps. The ratio of the measured Ds lifetime to the world average D0 lifetime is 1.25 +/- 0.04. This result differs from unity by six standard deviations, indicating significantly different lifetimes for the Ds and the D0.
Cite
@article{arxiv.hep-ex/9811016,
title = {Measurement of the Ds Lifetime},
author = {Fermilab E791 Collaboration and E. M. Aitala},
journal= {arXiv preprint arXiv:hep-ex/9811016},
year = {2008}
}
Comments
12 pages, 3 figures, 2 table. LaTeX