Semileptonic form factors of heavy-light mesons from lattice QCD
Rajan Gupta, Tanmoy Bhattacharya, David Daniel
Abstract
The form factors for the semileptonic decays of heavy-light pseudoscalar mesons of the type D Keν are studied in quenched lattice QCD at β=6.0 using Wilson fermions. We explore new numerical techniques for improving the signal and study O(a) corrections using three different lattice transcriptions of the vector current. We present a detailed discussion of the relation of these lattice currents to the continuum vector current and show that the disagreement between the previous results is to a large extent due to the value of ZV used in the calculations. We also present results for the decay constants of light-light, heavy-light and heavy-heavy mesons.
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