A determination of the Cabibbo-Kobayashi-Maskawa parameter |V us| using KL decays.
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).
Alexopoulos
T
T
University of Wisconsin, Madison, WI 53706, USA.
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Childress
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Coleman
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Ford
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Glazov
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Graham
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Jejer
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Jensen
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Kessler
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Kobrak
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Kotera
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Ledovskoy
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McBride
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Monnier
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Nelson
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Nguyen
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Niclasen
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Prasad
V
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Qi
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Ronquest
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Shanahan
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Slater
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Smith
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Solomey
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Toale
P A
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Tschirhart
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Wah
Y W
YW
Wang
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J
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HB
Whitmore
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Wilking
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M
Winstein
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Winston
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Worcester
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ET
Yamanaka
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T
Zimmerman
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