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A Determination of the CKM parameter |V(us)|
DOE
Source: doe_osti
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We present a determination of the CKM parameter |Vus| based on new measurements of the six largest KL branching fractions and semileptonic form factors by the KTeV (E832) experiment at Fermilab. We find |Vus| = 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)]E-3.. Authors: Alexopoulos, T.. DOE Contract: AC02-07CH11359. Subjects: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
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