Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2007-07-17
PoSKAON:014,2008
Physics
High Energy Physics
High Energy Physics - Experiment
Contributed paper to Lepton Photon 2007, Daegu, Korea, 13-18 August 2007, 5 pages, 2 figures
Scientific paper
This paper is devoted to the measurement of the fully inclusive absolute branching ratios of the charged kaon semileptonic decays, $K^{\pm}\to\pi^0e^\pm\nu(\gamma)$ and $K^\pm \to \pi^0\mu^\pm\nu(\gamma)$. The measurements have been done using a tag technique, employing the two-body decays, $K^\pm \to \mu^\pm\nu$ and $K^\pm \to \pi^\pm\pi^0$, and using a sample of about 410 pb$^{-1}$ collected during the 2001 and 2002 data taking of the KLOE experiment at Daphne, the Frascati $\phi$-factory. The results obtained are BR(K$^\pm_{e3}$) = $0.04965 (38)_{Stat} (37)_{Syst}$ and BR(K$^\pm_{\mu3}$) = $0.03233 (29)_{Stat} (26)_{Syst}$.
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