Kl3 semileptonic form factor from (2+1)-flavor lattice QCD

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

Research output: Contribution to journalArticlepeer-review

107 Citations (Scopus)


We present the first results for the Kl3 form factor from simulations with 2+1 flavors of dynamical domain wall quarks. Combining our result, namely, f+(0)=0.964(5) with the latest experimental results for Kl3 decays leads to |Vus|=0.2249(14), reducing the uncertaintity in this important parameter. For the O(p6) term in the chiral expansion we obtain Î"f=-0.013(5).

Original languageEnglish
Article number141601
JournalPhysical Review Letters
Issue number14
Publication statusPublished - 2008 Apr 9


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