We present results for the form factor f+Kπ (0), needed to extract the CKM matrix element jVusj from experimental data on semileptonic K decays, on the HISQ Nf = 2+1+1 MILC configurations. The HISQ action is also used for the valence sector. The data set used for our final result includes three different values of the lattice spacing and data at the physical light quark masses. We discuss the error budget and how this calculation improves on our previous determination of f+Kπ (0) on the asqtad Nf = 2+1 MILC configurations.
|Original language||English (US)|
|State||Published - 2013|
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