Speaker
Collaboration The KLOE
(Laboratori Nazionali di Frascati - INFN)
Description
KLOE has measured most decay branching ratios of K_S, K_L amd K^+- mesons.
It has also measured the K_L and the K^+- lifetime and determined the shape
of the form factors involved in kaon semileptonic decays.
We present a description of the above measurements and a well organized
compendium of all of our data, with particular attention to correlations.
These data provide the basis for the determination of the CKM parameter
V_us and a test of the unitary of the quark flavor mixing matrix.
We also test the lepton universality in Kl3 decays and place bounds
on new physics using measurements of V_us from Kl2 and Kl3 decays.
The most recent measurements published on this subject are:
JHEP 12(2007)105 (KLm3 scalar form factor);
JHEP 01(2008) 073 (K+- lifetime );
JHEP 02(2008) 098 (absolute semileptonic K+- BRs );
PLB 666 (2008) 305 (BR of K+ -> pi+pi0 ).
All of the above measurements, together with the results on KS, KL and K+-
decays published during 2006 and 2007 have recently combined in
JHEP 04 (2008) 059, to obtain the KLOE determination of Vus.
Furthermore, we expect to obtain soon new results on the KS lifetime,
KL lifetime and the BR for the K+- to 3 charged pion.
Primary author
Collaboration The KLOE
(Laboratori Nazionali di Frascati - INFN)
