A Measurement of the Ds+ Lifetime

Details A Measurement of the Ds+ Lifetime A Measurement of the Ds+ Lifetime

2005-04-27

arxiv.org/abs/hep-ex/0504056v2

Phys.Rev.Lett.95:052003,2005

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 3 figures, 2 tables, submitted to PRL

Scientific paper

10.1103/PhysRevLett.95.052003

A high statistics measurement of the Ds+ lifetime from the Fermilab fixed-target FOCUS photoproduction experiment is presented. We describe the analysis of the two decay modes, Ds+ -> phi(1020)pi+ and Ds+ -> \bar{K}*(892)0K+, used for the measurement. The measured lifetime is 507.4 +/- 5.5 (stat.) +/- 5.1 (syst.) fs using 8961 +/- 105 Ds+ -> phi(1020)pi+ and 4680 +/- 90 Ds+ -> \bar{K}*(892)0K+ decays. This is a significant improvement over the present world average.

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