6533b853fe1ef96bd12ac05e
RESEARCH PRODUCT
Kl3Semileptonic Form Factor from (2+1)-Flavor Lattice QCD
Peter BoyleShoichi SasakiRichard KenwayJames ZanottiAmarjit SoniChristopher T. SachrajdaAndreas JüttnerR. J. Tweediesubject
QuarkPhysicsQuantum chromodynamicsParticle physics010308 nuclear & particles physicsCabibbo–Kobayashi–Maskawa matrixLattice field theoryForm factor (quantum field theory)General Physics and AstronomyLattice QCD01 natural sciencesDomain wall (magnetism)Lattice gauge theory0103 physical sciences010306 general physicsdescription
We present the first results for the ${K}_{l3}$ 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 ${K}_{l3}$ decays leads to $|{V}_{us}|=0.2249(14)$, reducing the uncertaintity in this important parameter. For the $O({p}^{6})$ term in the chiral expansion we obtain $\ensuremath{\Delta}f=\ensuremath{-}0.013(5)$.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2008-04-09 | Physical Review Letters |