We present the latest results from the UKQCD/RBC collaborations for the Kl3 form factor from simulations with 2 + 1 flavours of dynamical domain wall quarks. Simulations are performed on lattices with two different volumes and four values of the light quark mass, allowing for an extrapolation to the chiral limit. The analysis includes a thorough investigation into the sources of systematic error in our fits. After interpolating to zero momentum transfer, we obtain f+(0) = 0.964(5) (or ∆ f = −0.013(5)) which, when combined with the latest experimental results for Kl3 decays, leads to |Vus| = 0.2249(14).
|Journal||Proceedings of Science|
|Publication status||Published - 2007|
|Event||25th International Symposium on Lattice Field Theory, LATTICE 2007 - Regensburg, Germany|
Duration: 2007 Jul 30 → 2007 Aug 4
ASJC Scopus subject areas