arXiv:hep-lat/0702026·v1·High Energy Physics — Lattice
K_l3 form factor with N_f=2+1 dynamical domain wall fermions: A progress report
D. J. Antonio · P. A. Boyle · C. Dawson · T. Izubuchi · A. Jüttner · C. Sachrajda · S. Sasaki · A. Soni · R. J. Tweedie · J. M. Zanotti
Abstract
We present the latest results from the UKQCD/RBC collaborations for the K_l3 form factor with 2+1 flavours of dynamical domain wall quarks. Simulations are performed on 16^3x32x16 and 24^3x64x16 lattices with three values of the light quark mass, allowing for an extrapolation to the chiral limit. After interpolating to zero momentum transfer, we obtain the preliminary result f_+^{K\pi}(0)=0.9609(51) (or \Delta f = -0.0161(51)), which is in agreement with the result of Leutwyler & Roos.
Comments: 4 pages, 4 figures. Talk presented at CKM2006, Nagoya, Japan