Measurement of the KL meson lifetime with the KLOE detector

Details Measurement of the KL meson lifetime with the KLOE detector Measurement of the KL meson lifetime with the KLOE detector

2005-07-20

arxiv.org/abs/hep-ex/0507088v2

Phys.Lett.B626:15-23,2005

Physics

High Energy Physics

High Energy Physics - Experiment

14 pages, 14 figures

Scientific paper

10.1016/j.physletb.2005.08.022

We present a measurement of the KL lifetime using the KLOE detector. From a sample of 4 x 10^8 KS KL pairs following the reaction e+ e- -> phi -> KS KL we select 15 x 10^6 KL -> p0 p0 p0 decays tagged by KS -> pi+ pi- events. From a fit of the proper time distribution we find tau_L = (50.92 +- 0.17{stat} +- 0.25{syst})$ ns. This is the most precise measurement of the KL lifetime performed to date.

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