K_l3 form factor with N_f=2+1 dynamical domain wall fermions: A progress report

2007/02/27 by D. J. Antonio, Antonio, D. J., P. A. Boyle +17
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Lattice (hep-lat) #High Energy Physics - Phenomenology (hep-ph) #hep-lat #hep-ph

paper · pdf · doi:10.48550/arxiv.hep-lat/0702026

4 pages, 4 figures. Talk presented at CKM2006, Nagoya, Japan

arxiv created 2007/02/27 · arxiv updated 2009/12/01

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 16³x32x16 and 24³x64x16 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₊^Kπ(0)=0.9609(51) (or Δf = -0.0161(51)), which is in agreement with the result of Leutwyler & Roos.

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