Kl₃ form factor with Nf = 2+1 dynamical domain wall fermions
Date
2008
Authors
Boyle, P.
Flynn, J.
Juttner, A.
Kenway, R.
Sachrajda, C.
Sasaki, S.
Soni, A.
Tweedie, R.
Zanotti, J.
Editors
Barlow, R.
Advisors
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Type:
Conference paper
Citation
Journal of Physics : Conference Series, 2008 / Barlow, R. (ed./s), vol.110, iss.10, pp.102012-1-102012-7
Statement of Responsibility
P A Boyle, J M Flynn, A Jüttner, R D Kenway, C T Sachrajda, S Sasaki, A Soni, R J Tweedie and J M Zanotti
Conference Name
European Physical Society (EPS) Europhysics Conference on High Energy Physics (HEP) (19 Jul 2007 - 25 Jul 2007 : Manchester, England)
Abstract
We present the latest results from the UKQCD/RBC collaborations for the K(sub)l3 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 Δf = -0.013(5)) which, when combined with the latest experimental results for K(sub)l3 decays, leads to |V(sub)us| = 0.2249(14).
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© 2008 IOP Publishing Ltd