Kl3 semileptonic form factor from (2+1)-flavor lattice QCD.
We present the first results for the K13 form factor from simulations with 2+1 flavors of dynamical domain wall quarks. Combining our result, namely, f+(0)=0.964(5) with the latest experimental results for Kl3 decays leads to |V us|=0.2249(14), reducing the uncertaintity in this important parameter. For the O(p6) term in the chiral expansion we obtain Delta f=-0.013(5).
School of Physics, University of Edinburgh, Edinburgh EH9 3JZ, United Kingdom.
P A
PA
Boyle
A
A
Jüttner
R D
RD
Kenway
C T
CT
Sachrajda
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S
Sasaki
A
A
Soni
R J
RJ
Tweedie
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Zanotti