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arXiv · hep-lat/9310007

Semileptonic form factors of heavy-light mesons from lattice QCD

Rajan Gupta·Tanmoy Bhattacharya·David Daniel
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Abstract

The form factors for the semileptonic decays of heavy-light pseudoscalar mesons of the type $D \to Keν$ 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 $Z_V$ 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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Rajan Gupta, Tanmoy Bhattacharya, David Daniel. 1993-10-07. Semileptonic form factors of heavy-light mesons from lattice QCD. https://arxiv.org/abs/hep-lat/9310007

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