Semileptonic D-decays and Lattice QCD

Details Semileptonic D-decays and Lattice QCD Semileptonic D-decays and Lattice QCD

2007-10-09

arxiv.org/abs/0710.1741v4

PoSLAT2007:355,2007

Physics

High Energy Physics

High Energy Physics - Lattice

7pages, proceedings write-up for Lattice 2007

Scientific paper

We explore four different strategies to extract the D-meson semileptonic decay form factors from the Green functions computed in QCD numerically on the lattice. From our numerical tests we find that two such strategies, based on the use of double ratios of 3-point correlation functions, lead to an appreciable reduction of systematic uncertainties. This is an important step in reducing the overall uncertainty in the lattice QCD results for the D-decay form factors which are needed to determine the CKM entries |Vcd| and |Vcs| experimentally, that are nowadays known by imposing the unitarity of the CKM matrix.

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