The experimentally measured rates of the semileptonic decays K → πl and D → K(π)l can be combined with lattice calculations of the associated form factors to precisely extract the CKM matrix elements |Vus| and |Vcs(d)|. We report on the status of form factor calculations with Fermilab charm quarks and staggered light quarks on the 2+1 flavor asqtad staggered MILC ensembles. Analysis of data for the D → πl form factor provides a nontrivial test of our methods via comparison with CLEO data. We discuss the use of HISQ valence quarks to calculate the K → πl form factor f+ Kπ(0) and describe tests of our method.
|Original language||English (US)|
|Journal||Proceedings of Science|
|State||Published - 2010|
|Event||28th International Symposium on Lattice Field Theory, Lattice 2010 - Villasimius, Sardinia, Italy|
Duration: Jun 14 2010 → Jun 19 2010
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