Kl3 form factor with Nf = 2+1 dynamical domain wall fermions

P. A. Boyle, R. D. Kenway, R. J. Tweedie, J. M. Zanotti, A. Jüttner, J. M. Flynn, C. T. Sachrajda, S. Sasaki, A. Soni

Research output: Contribution to journalConference articlepeer-review


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).

Original languageEnglish
Article number380
JournalProceedings of Science
Publication statusPublished - 2007
Externally publishedYes
Event25th International Symposium on Lattice Field Theory, LATTICE 2007 - Regensburg, Germany
Duration: 2007 Jul 302007 Aug 4

ASJC Scopus subject areas

  • General


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