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.
