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A Measurement of the Ds+ Lifetime

FOCUS Collaboration·J. M. Link
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Abstract

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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FOCUS Collaboration, J. M. Link. 2005-06-16. A Measurement of the Ds+ Lifetime. https://doi.org/10.1103/physrevlett.95.052003

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