B -> pi l nu at three lattice spacings
S. M. Ryan, A. X. El-Khadra, S. Hashimoto, A. S. Kronfeld, P. B. Mackenzie, J. N. Simone
Abstract
The increasing accuracy of experimental results for the exclusive, semileptonic decay B -> pi l nu 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 <= beta <= 6.1 we study the dependence on the lattice spacing.
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