Precision Measurement of KS Meson Lifetime with the KLOE detector
M. Antonelli, M. Dreucci (for the KLOE collaboration)
TL;DR
This paper reports a highly precise measurement of the KS meson lifetime using the KLOE detector, confirming previous results and showing no directional dependence.
Contribution
The study provides the most accurate measurement of the KS meson lifetime to date, utilizing a large data sample and detailed proper time analysis.
Findings
Measured tau = (89.562 +- 0.029_stat +- 0.043_syst) ps
Results are in good agreement with the world average
No dependence of lifetime on Ks direction
Abstract
Using a large sample of pure, slow, short lived K0 mesons collected with KLOE detector at DaFne, we have measured the KS lifetime. From a fit to the proper time distribution we find tau = (89.562 +- 0.029_stat +- 0.043_syst) ps. This is the most precise measurement today in good agreement with the world average derived from previous measurements. We observe no dependence of the lifetime on the direction of the Ks.
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