x / 05 07 08 8 v 2 1 7 O ct 2 00 5 Measurement of the K L meson lifetime with the KLOE detector
نویسندگان
چکیده
We present a measurement of the KL lifetime using the KLOE detector. From a sample of ∼ 4 × 10 KSKL pairs following the reaction ee → φ → KSKL we select ∼ 15 × 10 KL → πππ decays tagged by KS → ππ events. From a fit of the proper time distribution we find τL = (50.92 ± 0.17stat ± 0.25syst) ns. This is the most precise measurement of the KL lifetime performed to date. PACS: keywords:
منابع مشابه
ar X iv : h ep - e x / 05 07 08 8 v 1 2 0 Ju l 2 00 5 Measurement of the K L meson lifetime with the KLOE detector
We present a measurement of the KL lifetime using the KLOE detector. From a sample of ∼ 4 × 108 KSKL pairs following the reaction e+e− → φ → KSKL we select ∼ 15 × 106 KL → π0π0π0 decays tagged by KS → π+π− events. From a fit of the proper time distribution we find τL = (50.92 ± 0.17stat ± 0.25syst) ns. This is the most precise measurement of the KL lifetime performed up to date. PACS: keywords:
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