We present new preliminary results for the leptonic decay constants fB and fD+ determined in 2 + 1 flavor lattice QCD at lattice spacings a = 0.09, 0.12 and 0.15 fm. Results are obtained using the MILC Collaboration gauge configuration ensembles, clover heavy quarks in the Fermilab interpretation and improved staggered light quarks. Decay constants, computed at partially quenched combinations of the valence and sea light quark masses, are used to determine the low-energy parameters of staggered chiral perturbation theory. The physical decay constants are found in an extrapolation using the parameterized chiral formula.
|Original language||English (US)|
|Journal||Proceedings of Science|
|State||Published - 2007|
|Event||25th International Symposium on Lattice Field Theory, LATTICE 2007 - Regensburg, Germany|
Duration: Jul 30 2007 → Aug 4 2007
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