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标题：KLOE extraction of Vus from kaon decays and lifetimes
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作者：B. Sciascia ; F. Ambrosino ; A. Antonelli, M.,Antonelli 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2005
卷号：2005
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：The most precise determinations of Vus comes from semileptonic kaon decays. The KLOE experiment at DAFNE the Frascati f factory , has measured all the experimental inputs to Vus for both neutral and charged kaons. Preliminary results for BR(K± !p0e±n ) and BR(K± !p0m±n ), and for t± are presented, together with measurements of the KLe3 and KLm3 decay BR, the KSe3 decay BR and the KL lifetime tL. From our results for the 5 branching ratios and tL we find Vus=0.2258±0.0022. We have also measured the fully inclusive K+ m2(g ) absolute branching ratio for which we obtain BR(K+!mn (g ))=0.6366±0.0017. Combining this value with recent lattice results for fK/ fp gives Vus=0.2223±0.0026.