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25 April 2024

» pubmed » pmid15525151

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A determination of the Cabibbo-Kobayashi-Maskawa parameter \|V us\| using KL decays
T Alexopoulos ; M Arenton ; R F Barbosa ; A R Barker ; L Bellantoni ; A Bellavance ; E Blucher ; G J Bock ; E Cheu ; S Childress ; R Coleman ; M D Corcoran ; B Cox ; A R Erwin ; R Ford ; A Glazov ; A Golossanov ; J Graham ; J Hamm ; K Hanagaki ; Y B Hsiung ; H Huang ; V Jejer ; D A Jensen ; R Kessler ; H G E Kobrak ; K Kotera ; J LaDue ; A Ledovskoy ; P L McBride ; E Monnier ; K S Nelson ; H Nguyen ; R Niclasen ; V Prasad ; X R Qi ; E J Ramberg ; R E Ray ; M Ronquest ; E Santos ; P Shanahan ; J Shields ; W Slater ; D Smith ; N Solomey ; E C Swallow ; P A Toale ; R Tschirhart ; Y W Wah ; J Wang ; H B White ; J Whitmore ; M Wilking ; B Winstein ; R Winston ; E T Worcester ; T Yamanaka ; E D Zimmerman ; ;
Date:	29 Oct 2004
Journal:	Phys Rev Lett, 93 (18), 181802
Abstract:	We present a determination of the Cabibbo-Kobayashi-Maskawa parameter \|V(us)\| based on new measurements of the six largest K(L) branching fractions and semileptonic form factors by the KTeV (E832) experiment at Fermilab. We find \|V(us)\|=0.2252+/-0.0008(KTeV)+/-0.0021(ext), where the errors are from KTeV measurements and from external sources. We also use the measured branching fractions to determine the CP violation parameter \|eta(+-)\|=(2.228+/-0.005(KTeV)+/-0.009(ext))x10(-3).
Source:	PubMed, pmid15525151
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