Measurement of the Ds lifetime
M. Iori, et al. (SELEX Collaboration)
TL;DR
This paper presents a precise measurement of the Ds meson lifetime using data from the SELEX experiment, providing important insights into charm meson properties.
Contribution
The study reports the first precise measurement of the Ds meson lifetime using multiple decay modes with a large data sample.
Findings
Ds lifetime measured as 472.5 ± 17.2 ± 6.6 fs
Lifetime ratio of Ds to D0 is 1.145 ± 0.049
Data from 918 reconstructed Ds mesons used in analysis
Abstract
We report precise measurement of the Ds meson lifetime. The data were taken by the SELEX experiment (E781) spectrometer using 600 GeV/c Sigma-, pi- and p beams. The measurement has been done using 918 reconstructed Ds. The lifetime of the Ds is measured to be 472.5 +- 17.2 +- 6.6 fs, using K*(892)0K+- and phi pi+- decay modes. The lifetime ratio of Ds to D0 is 1.145+-0.049.
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