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T: Teilchenphysik

T 601: Seltene Zerf
älle

T 601.5: Talk

Friday, March 31, 2006, 12:15–12:30, HG2-HS2

Measurement of the Absolute Branching Ratios for Dominant K_L Decays, the K_L Lifetime, and V_us with the KLOE Detector — •Paolo Beltrame — Inst. fur Exp. Kernphysik (IEKP), Univ. of Karlsruhe (TH ), Postfach 3640 D-76021 Karlsruhe

From a sample of about 10^9 phi mesons producted at DAFNE, we have selected K_L meons tagged by observing K_S->pi^+pi^- decays. We present results on the major K_L branching ratios, including those ot the semileptonic dacays needed for the determination of ∣V_us∣. A measurement of the K_L lifetime is also given.