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Semileptonic form factors D →π, K and B →π, K from a fine lattice

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Al-Haydari, A. ; Ali Khan, A. ; Braun, Vladimir M. ; Collins, Sara ; Göckeler, Meinulf ; Lacagnina, G. N. ; Panero, M. ; Schäfer, Andreas ; Schierholz, Gerrit
Date of publication of this fulltext: 15 Mar 2010 13:15


We extract the form factors relevant for semileptonic decays of D and B mesons from a relativistic computation on a fine lattice in the quenched approximation. The lattice spacing is a=0.04 fm (corresponding to a^{-1}=4.97 GeV), which allows us to run very close to the physical B meson mass, and to reduce the systematic errors associated with the extrapolation in terms of a heavy quark expansion. ...


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