The increasing accuracy of experimental results for the exclusive, semileptonic decay ¯B −! l¯ requires a
similarly accurate calculation of the hadronic matrix elements, to determine |Vub|. We present preliminary results
for the form factors of the B to light meson decay mode. Using results from three lattices in the range 5.7 - 6.1
we study the dependence on the lattice spacing.
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